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Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Only 1 leftPlay Tronix
Airframe: foam/balsa/corrugated. Components: propeller, DC motor/brushless, servo(s), control horns, pushrods. Electronics: ESC (if brushless), battery. Concepts: lift/drag/thrust, CG/balance.
Razer BlackShark V2 X
Lightweight 240 g esports headset. TriForce 50mm drivers, single 3.5mm cable. Balanced sound for FPS.
2 Inch 4 Ohms 5Watt Internal Magnet Speaker with Frame
[Speakers] 2-Inch Internal Magnet Speaker with Frame – 53×29×23mm 4Ω 5W The 2-Inch Internal Magnet Speaker with Frame is a compact and efficient audio driver designed for DIY electronics, portable audio devices, alarms, toys, embedded systems, and other space-constrained applications. Featuring an internal magnet design and durable frame construction, this speaker provides clear and balanced sound output while maintaining a compact footprint. With dimensions of 53×29×23mm, 4Ω impedance, and a 5W power rating, this speaker is suitable for small amplifier projects and electronic devices requiring a compact audio solution. The mounting frame makes installation convenient in custom enclosures and equipment. ⭐ Key Features 2-Inch compact speaker design Internal magnet structure 4Ω impedance 5W power rating Durable metal frame construction Clear and balanced sound output Compact and space-saving design Easy mounting with frame and screw slots Suitable for low and medium-power audio applications Ideal for DIY and OEM applications 📋 Technical Specifications Product Type: Dynamic Internal Magnet Speaker Speaker Size: 2 Inch Dimensions: 53 × 29 × 23mm Impedance: 4Ω Power Rating: 5W Magnet Type: Internal Magnet Magnet Material: Ferrite Shape: Rectangular Frame Type: Metal Frame Cone Material: Paper / Mylar Diaphragm depending on variant Speaker Type: Full Range / Dynamic Speaker Mounting: Frame with Screw Slots Application: Compact Audio & Embedded Electronics 🔧 Applications DIY Speaker Projects Portable Audio Devices Bluetooth Speaker Projects Alarm Systems Toys and Sound Modules Intercom Systems Embedded Electronics Educational Electronics Kits Replacement Speaker Repairs Smart Gadgets OEM Product Manufacturing Mini Amplifier Projects 🛠️ Installation Connect the speaker to a compatible amplifier output matching the speaker's 4Ω impedance and 5W power rating. Secure the speaker firmly using the mounting frame to reduce unwanted vibration and noise during operation. 📦 Package Includes 1 × 2-Inch Internal Magnet Speaker with Frame – 4Ω 5W ⚠️ Precautions Match the 4Ω impedance with the amplifier output. Do not exceed the 5W rated power. Avoid applying direct DC voltage to the speaker. Avoid exposure to moisture and excessive humidity. Mount the speaker securely before operation. Do not apply physical pressure to the speaker cone or diaphragm. Avoid short circuits at the speaker terminals. Keep the speaker away from excessive heat and magnetic interference.
2.25-Inch 8ohms 8W Full Range Speaker for Compact Audio Applications
[Speakers] 2.25-Inch 8Ω 8W Full Range Speaker for Compact Audio Applications The 2.25-Inch 8Ω 8W Full Range Speaker is a compact and efficient audio driver designed for small electronic and embedded sound applications. Featuring an 8Ω impedance and 8W power rating, this speaker delivers clear and balanced sound output while maintaining low power consumption and excellent efficiency. Its compact size makes it ideal for projects where installation space is limited, including portable speakers, DIY electronics, toys, alarm systems, intercom devices, and mini speaker enclosures. The full-range design allows it to reproduce a broad range of audio frequencies, making it suitable for both voice and music playback applications. Built with durable materials and designed for reliable long-term performance, this speaker is an excellent choice for electronics hobbyists, engineers, and product developers working on custom audio projects. ⭐ Key Features 2.25-Inch compact speaker driver 8Ω impedance 8W power rating Full-range audio reproduction Clear and balanced sound output Lightweight and compact design Easy to mount in enclosures and panels Suitable for low to medium-power audio applications Durable construction for long-term use Ideal for DIY and embedded audio systems 📋 Technical Specifications Product Type: Full Range Speaker Speaker Size: 2.25 Inch Impedance: 8Ω Power Rating: 8W Speaker Type: Full Range Mounting Type: Enclosure / Panel Mount Application Type: Audio Output 🔧 Applications Portable Speaker Systems DIY Audio Projects Bluetooth Speaker Modules Toys and Educational Kits Alarm and Notification Systems Embedded Electronic Devices Mini Amplifiers and Sound Modules Intercom Systems Robotics Projects Custom Speaker Enclosures ⚠️ Precautions Do not exceed the 8W rated power. Use an amplifier compatible with an 8Ω speaker load. Avoid exposure to moisture and excessive dust. Mount securely to minimize vibration and distortion. Do not apply direct pressure on the speaker cone. 📦 Package Includes 1 × 2.25-Inch 8Ω 8W Full Range Speaker
57mm (2.25-Inch) Internal Magnet Speaker 4Ohms 3W Full Range Audio Speaker
[Speakers] 57mm (2.25-Inch) Internal Magnet Speaker – 4Ω 3W Full Range Audio Speaker The 57mm (2.25-Inch) Internal Magnet Speaker is a compact and reliable full-range audio speaker designed for DIY electronics, multimedia devices, embedded sound systems, and portable audio applications. Featuring a 4Ω impedance and 3W power rating, this speaker delivers clear and balanced sound output while maintaining a slim and lightweight design. Its internal magnet structure provides a compact profile, making it ideal for applications where installation space is limited. The durable mounting frame allows easy integration into speaker enclosures, control panels, intercom systems, audio modules, and custom electronic projects. Designed for consistent audio performance, this speaker is suitable for voice playback, music, alerts, and general audio output in both portable and embedded electronic devices. ⭐ Key Features 57mm (2.25-Inch) compact speaker 4Ω impedance 3W power rating Internal magnet design Full-range audio reproduction Built-in mounting frame Clear and balanced sound output Compact and lightweight construction Easy installation in custom enclosures Suitable for portable and embedded audio applications Ideal for DIY electronics and speaker projects 📋 Technical Specifications Product Type: Internal Magnet Speaker Speaker Size: 57mm (2.25 Inch) Impedance: 4Ω Power Rating: 3W Speaker Type: Full Range Magnet Type: Internal Magnet Frame Type: With Mounting Frame Mounting: Frame / Panel Mount Application: Embedded Audio Systems 🔧 Applications DIY Electronics Projects Audio Modules & Music Players Intercom and Communication Systems Toys and Educational Devices Portable Audio Systems Alarm and Notification Devices Embedded Audio Applications Mini Speaker Enclosures Multimedia Devices Robotics and Automation Projects ⚠️ Precautions Do not exceed the 3W rated power. Use an amplifier compatible with a 4Ω speaker load. Ensure proper wiring polarity during installation. Avoid exposure to moisture and dust. Mount securely to reduce vibration noise. Do not apply direct pressure on the speaker cone. 📦 Package Includes 1 × 57mm (2.25-Inch) 4Ω 3W Internal Magnet Full Range Speaker
2.25 Inch 4 Ohm 10 Watt Full Range Speaker with Neodymium Magnet
[Speakers] 2.25-Inch Speaker Driver • 4 Ohm Impedance • 10W Power Rating • Neodymium Magnet • Compact Full Range Audio Speaker The 2.25 Inch 4 Ohm 10 Watt Full Range Speaker with Neodymium Magnet is a compact and high-performance speaker driver designed for portable audio systems, DIY speaker projects, multimedia devices, embedded electronics, and custom sound enclosures. Featuring a powerful neodymium magnet, this speaker delivers clear vocals, balanced midrange, and improved bass response while maintaining a lightweight and compact design. With a 4 ohm impedance and 10 watt power rating, the speaker is suitable for use with small audio amplifiers, Bluetooth amplifier modules, DIY portable speakers, mini sound systems, toys, alarm systems, educational kits, and embedded electronic devices. The full-range design allows it to reproduce a wide spectrum of audio frequencies without requiring additional tweeters for many compact applications. Its durable construction and lightweight neodymium magnet assembly make it ideal for applications where both performance and space efficiency are important. ⭐ Features Compact 2.25-inch full range speaker Powerful neodymium magnet 4 ohm impedance 10 watt power rating Clear and balanced sound output Enhanced vocal clarity and midrange performance Lightweight and compact construction Easy to mount in custom enclosures Suitable for portable and embedded audio systems Ideal for DIY electronics and audio projects 📋 Technical Specifications Product Type: Full Range Speaker Driver Speaker Size: 2.25 Inch Impedance: 4 Ohm Power Rating: 10 Watt Magnet Type: Neodymium Speaker Type: Full Range Mounting Type: Enclosure / Panel Mount Application Type: Audio Output Frame Material: Metal Cone Material: Paper Composite Color: Black 🔧 Applications Suitable for: Portable Speaker Systems Bluetooth Speakers DIY Audio Projects Mini Sound Systems Multimedia Devices Toys and Educational Kits Alarm and Notification Systems Embedded Electronic Devices Mini Amplifiers Sound Modules Intercom Systems Custom Speaker Enclosures Robotics and Electronics Projects 📦 Package Includes 1 × 2.25 Inch 4 Ohm 10 Watt Full Range Speaker with Neodymium Magnet ⚠️ Precautions Do not exceed the 10W rated power. Use an amplifier compatible with 4 ohm speakers. Avoid exposure to moisture, water, and excessive dust. Mount the speaker securely to minimize unwanted vibration. Do not apply direct pressure to the speaker cone or surround.
TDT LiFePO4 LFP 4S 12.8V 25A Battery Management System
[Lithium Battery Protection Board] The TDT 4S 12.8V 25A LiFePO4 Battery Management System (BMS) is designed to protect and manage 4-cell LiFePO4 battery packs. It continuously monitors each cell’s voltage and current to ensure safe and stable operation. In addition, the BMS includes a balancing function, which helps maintain equal voltage across all cells. As a result, the battery pack delivers better performance and longer life. Moreover, the module provides multiple protection features, including overcharge, over-discharge, overcurrent, and short-circuit protection. Therefore, it prevents damage to the battery and improves reliability. Because of its compact design and efficient performance, this BMS is ideal for solar systems, backup power solutions, electric vehicles, and DIY battery packs. 🔹 Key Features Supports 4S LiFePO4 (LFP) battery packs Nominal voltage 12.8V 25A continuous discharge current Built-in cell balancing High reliability and stable operation Compact and easy to install Suitable for various battery applications 🔹 Protection Functions Overcharge protection Over-discharge protection Overcurrent protection Short-circuit protection Temperature protection (if supported) 🔹 Technical Specifications Parameter Specification Brand TDT Battery Type LiFePO4 (LFP) Battery Configuration 4S Nominal Voltage 12.8V Max Continuous Current 25A Balance Function Yes Application Lithium battery protection 🔹 Applications Solar battery systems DIY LiFePO4 battery packs Backup power systems Electric scooters and bikes Energy storage systems (ESS) 🔹 Package Includes 1 × TDT 4S 12.8V 25A LiFePO4 BMS Board
2S 20A 7.4V / 8.4V 18650 Lithium Battery Protection Board with Balance
[Li-ion Rechargeable Battery Charger, Lithium Battery Protection Board] The 2S 7.4V / 8.4V 20A Lithium Battery Protection Board with Balancing is a compact and reliable Battery Management System (BMS) designed for 2-cell (2S) 18650 lithium-ion battery packs. This board provides complete protection and automatic cell balancing to ensure safe charging, stable discharging, and long battery life. With a nominal output of 7.4V and a full charge voltage of 8.4V, this protection board supports continuous current up to 20A, making it suitable for medium-power applications such as DIY battery packs, portable power tools, robotics, LED systems, solar projects, and backup power supplies. The built-in balancing function equalizes the voltage between both cells during charging, preventing overcharging of individual cells and improving overall pack efficiency and lifespan. Multiple protection features including over-charge, over-discharge, over-current, and short-circuit protection ensure maximum safety during operation. Compact in size and easy to wire, this BMS is ideal for both DIY users and professional battery pack manufacturers. ⭐ KEY FEATURES ✔ Designed for 2S (2-cell) 18650 lithium battery packs✔ 20A continuous discharge current support✔ Built-in cell balancing function✔ Protection against over-charge, over-discharge, over-current & short circuit✔ Improves battery safety, performance & lifespan✔ Compact PCB – easy to integrate✔ Ideal for DIY & professional battery pack builds 🔧 TECHNICAL SPECIFICATIONS Battery Configuration: 2S (2 cells in series) Nominal Voltage: 7.4V Full Charge Voltage: 8.4V Maximum Continuous Current: 20A Battery Type: 3.7V Li-ion (18650 rechargeable cells) Balancing Function: Yes (automatic during charging) Protection Functions: Over-charge protection Over-discharge protection Over-current protection Short-circuit protection 🔌 WIRING GUIDE – How to Connect 2S Battery Pack 🔹 Board Terminals (Typical Marking) B- → Battery negative (Cell 1 −) B1 → Between Cell 1 & Cell 2 B+ → Battery positive (Cell 2 +) 🔹 Output / Charger Terminals P- → Load / Charger negative P+ → Load / Charger positive (same as B+) 🔧 Connection Steps Connect Cell 1 negative → B- Connect Cell 1 positive / Cell 2 negative → B1 Connect Cell 2 positive → B+ Connect Load & Charger + → P+ (or B+) Connect Load & Charger − → P- ⚠️ Use only matched 18650 cells and an 8.4V Li-ion charger. 🎯 APPLICATIONS DIY lithium battery packs Power tools & cordless devices Robotics & automation projects LED lighting systems Solar battery packs Backup power & portable energy systems 📦 PACKAGE INCLUDES 1 × 2S 20A Lithium Battery Protection Board with Balancing
7S 20A BMS for 18650 Lithium-Ion Battery Pack – Protection Board with Connector
[Lithium Battery Protection Board] The BMS NMC 7S 20A Same Port is an advanced Battery Management System designed for high-performance 25.9V lithium NMC battery packs. Engineered with integrated protection features and a compact PCB layout, this BMS offers robust electrical safety while minimizing design complexity with its single port for both charging and discharging. This Data sheet is for Lichtronics 7S 20A NMC PCM/BMS Charging Voltage -DC:29.4-30V CC/CV Max continuous charging current – 20A Over charge detection voltage – 4.25±0.05V Over discharge detection voltage – 2.8±0.08V Over current detection current – 40A Operating Temperature -45°C –+65°C Storage Temperature -45°C — +85°C Product Data Sheet Key Features Same Port Design: Combines charging and discharging through a single port for streamlined connections. 20A Continuous Discharge: Supports mid-range power devices with stable performance. Multiple Safety Protections: Overcharge Protection Over-discharge Protection Overcurrent & Short Circuit Cut-off Temperature Detection Passive Balancing: Ensures equal charge across cells for longer battery life. Compact and Lightweight Design: Ideal for tight enclosures or portable builds. Connector Included: Easily connect to standard 7S battery configurations. Technical Specifications Specification Details Battery Chemistry Lithium NMC (3.7V/cell) Configuration 7S (7 Cells in Series) Nominal Voltage 25.9V Charge Cut-off Voltage 29.4V (4.2V per cell) Discharge Cut-off ~17.5V (2.5V per cell) Max Continuous Current 20A Port Type Same port for charge/discharge PCB Size Compact footprint Balance Current 30-60 mA Applications Electric Bikes & Scooters Solar Lighting & Backup Power Portable DIY Power Systems Battery Replacements & Packs Energy Storage & IoT Solutions The PCM NMC 07S/20A SAME PORT (SLCT) is a Protection Circuit Module (PCM) designed for lithium nickel manganese cobalt (NMC) battery packs configured in a 7-series (07S) setup. This module provides overcharge, over-discharge, overcurrent, and short-circuit protection to safeguard the battery and enhance its lifespan. It is rated for a maximum continuous current of 20A, allowing higher current flow for larger applications. The "SAME PORT" feature suggests that both charging and discharging can occur through the same port, simplifying the battery management system. The "SLCT" (selectable) feature likely refers to adjustable settings for specific battery configurations or protections. 📦 Package Includes 1 × 7S 20A BMS Protection Board (with connector)
10S 20A Lithium-ion BMS 18650 Battery Charging Board
[Lithium Battery Protection Board] Overview of this 10S 20A BMS 18650 Battery Charging Board Introducing 10S 20A BMS 18650 Battery Charging Board at best price in India. This 10S 20A BMS provides comprehensive protection and efficient management for 18650 lithium batteries. It offers critical safeguards against overcharging, over-discharging, and short circuits, ensuring battery safety and longevity. Ideal for high-power applications, this 10S BMS for 18650 lithium battery delivers reliable performance and durability. With its 20A current rating, the 20A BMS for 18650 lithium battery charger board supports demanding energy systems. The advanced circuitry ensures optimal charging and discharging, reducing heat and extending battery life. Its robust design and high-performance capabilities make it suitable for both professional and DIY projects. Upgrade your battery management with this efficient and dependable 10S 20A BMS 18650 Battery Charging Board. Features 20A High Current Support: Handles up to 20A continuous current, suitable for high-power applications. Ensures reliable energy delivery for demanding devices and systems. 10S Configuration: Designed for 10 series lithium-ion cells, providing balanced charging and discharging. Maintains cell balance for improved performance and battery lifespan. Advanced Protection Features: Includes protection against overcharge, overdischarge, short-circuits, and overcurrent. Enhances safety and prevents damage to the battery pack. Efficient Heat Management: Built with components that ensure effective heat dissipation during operation. Prevents overheating and maintains consistent performance under load. Compact and Durable Design: This 10S 20A BMS 18650 battery charging board fits easily into various battery setups and projects. Its durable built ensure reliability and long life in diverse condition. Specification No. Tested Item Criterion 1 Voltage Charging Voltage DC:42V CC/CV Blance Volatage for single cell 4.1V 2 Current Blance Current for single cell 40 ± 20 mA Current consumption <= 30µA Max continuous charging current 20A Max continuous discharging current 20A 3 Over Charge Protection Over charge detection voltage 4.25 ± 0.03V Over charge detection delay time <1000ms Over charge release voltage 4.15 ± 0.05V 4 Over discharge detection voltage Over Discharge Protection 2.7 ± 0.08V Over discharge detection delay time 1400ms Over discharge release voltage 3±0.08V 5 Over Current Protection Over current detection current (discharging) 20A±3A Release condition Cut load Over current detection delay time <1300ms 6 Short Circuit Protection Detection condition (120A) Exterior short circuit Release condition Cut short circuit Short circuit detection delay time 300us 7 Temperature Protection Temperature Protection Charging 50°C Discharging 70°C 8 Interior Resistance Main loop electrify resistance VC=4.2V,RDS≤60mΩ 9 Temperature Operating Temperature -45°C –+65°C Storage Temperature -45°C+85°C Package Includes: 1 X 10S 20A BMS 18650 Battery Charging Board
4S 5A Active Balancer Equalizer Board for LiFePO4/Li-ion
[Lithium Battery Protection Board] 4S 5A Active Balancer Equalizer Board for LiFePO4/Li-ion Software active equalization specification Number of battery pack strings – 4S Balance current ≤5A Balance mode – Active equilibrium working temperature -20°C~60°C The 4S5A Active Balancer (NEEY) is a battery management solution designed for 4 series lithium-based battery packs. It supports 5A of current per cell for active balancing, which ensures that all cells in the battery pack remain at a balanced voltage level. Active balancing redistributes energy from cells with higher voltage to those with lower voltage, optimizing the overall performance and efficiency of the battery. This helps prevent individual cells from becoming overcharged or discharged excessively, extending the lifespan and enhancing the safety of the battery pack. The NEEY model delivers reliable performance in energy storage systems, electric vehicles, and other high-demand lithium battery applications. Applicable battery type : NCM/LFP Teemary Lithium/Lithium Iron Single voltage working range: NCM/LFP version 3.0V-4.2V Balance method : Detect the nearby voltage difference is greater than 0.1V totrigger the start of balanced the adjacent battery voltage difference is less than 003V to stop working Balance current: 0.2V Adjacent voltage difference 0.1V, Balance current: 054-0.74, Adjacent voltage difference 0.2V. Balanced current: 2A LED indicator : 1. When the equalization light is on the equalization work is turned on, 2. The equalization light goes out the equalization circuit sleeps Operating Temperature Range: -20° to 60° The smaller the differential voltage, the smaller the balance current. Package Include: 1x 4S 5A Active Balancer Equalizer Board for LiFePO4/Li-ion 1x Cable
Single Shaft BO Motor 100 RPM
[Gear Motor] 100 RPM Single Shaft BO Motor – Straight Shaft The 100 RPM Single Shaft BO Motor is a lightweight and cost-effective solution designed for DIY robotics, small automation systems, and educational projects. Offering an excellent balance between torque and speed at low operating voltages, this motor is ideal for small to medium-sized robots. With its compact and durable construction, the motor features pre-drilled mounting holes for easy installation and perfectly pairs with 69mm robot wheels, making it an excellent choice for 2WD mobile robot platforms. Its low noise, low power consumption, and reliable torque output make it a favorite among hobbyists, students, and developers. Specifications: Shaft Length: 7mm Shaft Diameter: 5.5mm Motor Size: 55 × 48 × 23mm Voltage Range: 3V – 12V DC No-load Current: 40 – 180mA Speed: 100 RPM @ 6V Torque: 0.35 kg-cm Key Features: Lightweight and compact design Cost-effective with injection-molded housing Resilient, shock-absorbing construction Low power consumption and minimal maintenance Quiet operation with reduced friction Corrosion-resistant for long life Easy mounting with pre-drilled holes Ideal For: DIY robotics and automation projects Line follower and obstacle-avoiding robots Educational robotics kits Small mechanical prototypes Package Includes: 1 × 100 RPM Single Shaft BO Motor (Straight Shaft)
Out of stockTDT 10S 20A NMC Battery Protection and Charger BMS with Balance Hardware
TDT BMS NMC 10S 20A WITH BALANCE Hardware Product Data Sheet The BMS NMC 10S 20A WITH BALANCE (TDT) is a robust and efficient Battery Management System designed for 10-series (10S) lithium-ion NMC battery packs. With a nominal system voltage of 37V and a continuous current capacity of 20A, this module ensures safe and stable operation of high-performance battery packs used in e-mobility, energy storage, and industrial tools. Technical Specifications Battery Chemistry: Lithium-ion (NMC) Configuration: 10S (10 cells in series) input Voltage B+ to B-: -0.3~+20V Overcharge Detection voltage/1CELL: 4.28±0.05V Over discharge Detection voltage/1CELL: 2.8±0.1V Over current: 4-6A Suggest working temperature: -20°C~+60°C Key Features 20A High Current Support Perfect for mid-to-high power battery packs used in electric bikes, scooters, power tools, and solar inverters. Built-in Balancing Function Automatically maintains uniform voltage across all cells to extend overall battery life. Comprehensive Protections Protects against overcharge, over-discharge, overcurrent, short circuit, and thermal runaway. Durable Aluminum Heat Sink Casing Helps dissipate heat effectively for stable thermal performance. Applications Electric Bicycles & Scooters (E-Bikes) Solar Battery Packs & Inverters DIY 10S Battery Pack Projects Cordless Industrial Tools Electric Wheelchairs & Mobility Carts The PCM NMC 10S 20A WITH BALANCE (TDT) is a Battery Protection Circuit Module (PCM) designed for 10 series Nickel Manganese Cobalt (NMC) battery packs, supporting a 20A continuous discharge current. This module is ideal for high-power applications such as energy storage systems, backup power solutions, and electric vehicles. It offers essential protection features, including overcharge, over-discharge, overcurrent, short circuit, and temperature protection, ensuring the safe operation of the battery. The WITH BALANCE feature ensures proper voltage balancing across the cells, optimizing performance and extending the battery’s lifespan. The TDT designation indicates a specific manufacturer or design for reliable battery management.
JIABAIDA (JBD) NMC 10S 36V 20A Battery Management System
[Lithium Battery Protection Board] The JIABAIDA (JBD) 10S 37V 20A Battery Management System (BMS) is an advanced electronic module designed to protect and manage 10S lithium-ion battery packs using NMC chemistry. It ensures safe operation by continuously monitoring voltage, current, and temperature. In addition, the BMS includes cell balancing functionality, which helps maintain equal voltage across all cells. As a result, battery performance improves and lifespan increases. Moreover, the system features multiple protection mechanisms, including overcharge, over-discharge, overcurrent, and short-circuit protection. Therefore, it helps prevent battery damage and ensures reliable operation. Because of its compact design and accurate monitoring, this BMS is suitable for electric bikes, battery packs, solar storage systems, and portable power applications. 🔹 Key Features Supports 10S Li-ion (NMC) battery packs 20A continuous discharge current Built-in cell balancing function High-accuracy voltage monitoring Temperature monitoring support Multiple protection systems Stable and reliable performance Suitable for DIY and industrial use 🔹 Protection Functions Overcharge protection Over-discharge protection Overcurrent protection Short-circuit protection Temperature protection 🔹 Technical Specifications Parameter Specification Brand JIABAIDA (JBD) Battery Type Li-ion (NMC) Battery Configuration 10S Nominal Voltage 37V Max Continuous Current 20A Cell Voltage Range 0V – 4.2V Temperature Range -40°C to 85°C Voltage Balance Accuracy ±5mV Current Accuracy ±50mA 🔹 Applications Electric bikes (E-bike) DIY battery packs Solar energy storage systems Portable power systems Electric scooters Backup power solutions 🔹 Package Includes 1 × JBD 10S 37V 20A Battery Management System (BMS)
JBD 3-4S/100A Smart BMS For LiFePO4 (LFP) batteries
[Lithium Battery Protection Board] JBD Smart BMS 3-4S 100A (DP04S014) Charge and discharge are both at the same port Product Data Sheet Cell specifications: 3~4 strings of LiFePO4 battery Continuous current: 100A Balance detect Voltage 3.8 Interface type: Charge and discharge are both at the same port Charging voltage: 3.6V*Number of strings Cell voltage range: 2.30~3.75V Continuous charging current: 100A Continuous discharging current: 100A The JBD SMART BMS 100A DP04S014 (3-4S) is a compact and powerful Battery Management System designed for lithium-ion and LiFePO4 battery packs with 3 to 4 series cells. It supports a continuous discharge current of 100A, making it suitable for high-power applications such as electric vehicles, portable power systems, and energy storage solutions. This BMS provides essential protection features including overcharge, over-discharge, overcurrent, short circuit, and temperature management to ensure safe and reliable battery operation. With active cell balancing, it maintains voltage consistency across cells. It also supports UART, RS485, and CANBUS communication, along with Bluetooth for real-time monitoring and diagnostics, offering flexibility and control over battery performance. Package Includes: 1 x JBD 3-4S/100A Smart BMS For LiFePO4 (LFP) batteries 1 x 5 Pin Connector
4S 20A 18650 Lithium Battery Protection Board
[Lithium Battery Protection Board] The HXYP-4S-BM20 4S 20A Lithium Battery Protection Board (BMS) is a compact and reliable battery management system designed specifically for 3.7V lithium-ion 18650 rechargeable cells. This board provides complete protection and safe operation for building 4-cell (4S) battery packs with a nominal output voltage of up to 14.8V and a full charge voltage of 16.8V. Featuring a square, lightweight, and portable design, this protection board is easy to integrate into custom battery packs and compact enclosures. It allows you to connect four 18650 lithium cells simultaneously and ensures balanced and safe charging and discharging. The board includes multiple built-in safety protections such as over-charge protection, over-discharge protection, over-current protection, and short-circuit protection, helping to extend battery life and prevent damage or hazardous conditions. This module is ideal for use in DIY battery packs, power tools, solar storage systems, electric scooters, backup power supplies, robotics, and other lithium battery applications. ⭐ Key Features ✔ Designed for 4S (4-cell) 18650 lithium-ion battery packs ✔ Supports continuous current up to 15A ✔ Built-in protection for over-charge, over-discharge, over-current & short circuit ✔ Compact square PCB design – easy to install ✔ Low power consumption with ultra-low quiescent current ✔ Increases battery safety, reliability, and lifespan 🔧 Technical Specifications Model: HXYP-4S-BM20 Battery Type: 3.7V Li-ion (18650 rechargeable cells) Configuration: 4S (4 cells in series) Charging Voltage: 16.8V Maximum Continuous Current: 15A Maximum Peak Current: 20A Over-Charge Voltage: 4.25 ± 0.05V per cell Over-Discharge Voltage: 2.5 ± 0.05V per cell Quiescent Current: < 30 µA Board Size: 3.6 × 3.6 cm Country of Origin: China 🎯 Applications DIY lithium battery packs Power tools & backup batteries Solar energy storage systems Electric scooters & e-bikes Robotics & embedded systems UPS & portable power stations 🔹 Battery Connection Terminals on Board Usually marked as: B- → Battery Pack Negative (Cell 1 –) B1 → Connection between Cell 1 & Cell 2 B2 → Connection between Cell 2 & Cell 3 B3 → Connection between Cell 3 & Cell 4 B+ → Battery Pack Positive (Cell 4 +) 🔹 Output / Charge Terminals P- → Load / Charger Negative P+ → Load / Charger Positive (same as B+) 🔧 Step-by-Step Wiring Connect 4 cells in series: Cell order:Cell1 → Cell2 → Cell3 → Cell4 Then wire as: Cell1 negative → B- Cell1 positive / Cell2 negative → B1 Cell2 positive / Cell3 negative → B2 Cell3 positive / Cell4 negative → B3 Cell4 positive → B+ For charging & discharging: Charger / Load positive → P+ (or B+) Charger / Load negative → P- ⚠️ Safety Tips Always connect balance wires before main power wires Use proper insulated wires and nickel strips Do not short any terminals Use a 16.8V Li-ion charger for 4S packs Ensure BMS current rating matches your load 📦 Package Includes 1 × -4S-BM20 4S 20A Lithium Battery Protection Board (BMS) * Product Images are shown for illustrative purposes only and may differ from actual product.
6S 12A Lithium Battery 18650 Charger PCB BMS Protection Board
[Lithium Battery Protection Board] Description PCB BMS 6 Series 22V 18650 Lithium Battery Protection Board is a 6 string 22V circuit power tool mostly used for solar lighting, for dedicated 18650 battery packs. It is designed for 3.7V 18650 models lithium batteries for charging, Protection from overcharge and over-discharge. Battery protection board, as the name suggests battery protection board is mainly rechargeable (Refers to the lithium battery) and protects the integrated circuit board. Lithium battery (rechargeable type) so need protection, is determined by its own characteristics. As the lithium battery, its material determines itself can not be overcharge, over-discharge, overcurrent, short circuit, and ultra-high temperature charge and discharge, so lithium battery lithium components will always follow A protective plate with a sampling resistor, and a current fuse. Application: Battery pack Consumer electronics product 12V voltage rating Power supply Power bank and charger Features/Specs: Battery: 6 Cell Overcharge detection voltage: 4.25 ± 0.025V Over-discharge detection voltage: 2.50 ± 0.08V Overcurrent Protection: 50A Working current: 12A Operating Temperature: -40~+85°C Balanced charge: None. Short circuit protection: Yes. Applicable assembly: Nominal 3.7V Batteries / 6 strings Length: 50mm Width: 32mm Height: 4mm Weight: 6gm Package Includes: 1 x 6S 12A Lithium Battery 18650 Charger PCB BMS Protection Board Note: Product Images are shown for illustrative purposes only and may differ from the actual product
4 Series 40A 18650 Lithium Battery Protection Board 14.8V 16.8V with Balance for Drill Motor Lipo Cell Module 4S 40A
[Lithium Battery Protection Board] The 4 Series 40A 18650 Lithium Battery Protection Board 14.8V 16.8V with Balance for Drill Motor Lipo Cell Module comes with recovery function – AUTO Recovery and Integrated 10 low load resistance MOS tube. It provides a continuous discharge of 40A, 100mA balanced current, for electric drill/sprayer/LED lights/low power inverter. (If the cooling environment is not good, please reduce the load current use). The Scope of Nominal voltage of 3.6V, 3.7V lithium battery (including 18650, 26650, a polymer lithium battery) where Charging voltage can be range between 16.8V to 18.1V The board operates smoothly with Continuous charge current of (upper limit): 20A. The balanced version is suitable for starting current below 80A, power 135W below the drill (with balance). The Board which can be easily installed in a compact size or on battery bundle itself. Note: The Successful start of the drill requires a three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 cannot start the drill!!). Strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit. When the load of the brush motor is used, try to connect a non-polar capacitor (withstand voltage above25V, capacity 10uF-100uF) to the motor’s positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube. 4 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use it in series. The Discharge test, the voltage drop faster battery that group is a poor battery. Features: 4 string 16.8V 40A lithium battery protection board (comes with recovery function-AUTO Recovery). Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, a polymer lithium battery). Product weight: 9.3g (standard / enhanced version), 10.3g (balanced version). Charging voltage: 16.8V – 18.1V. Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use). Continuous charge current (upper limit): 20A. Equalization version: suitable for starting current below 80A, power 135W below the drill. Package Includes: 1 x 4 Series 40A 18650 Lithium Battery Protection Board.
TDT LiFePO4 LFP 4S 12.8V 10A Battery Management System
[Lithium Battery Protection Board] The TDT LiFePO4 LFP 4S 12.8V 10A Battery Management System (BMS) is designed to protect and manage 4-cell LiFePO4 battery packs (12.8V nominal). It ensures safe charging and discharging by providing multiple protection functions, improving battery life and safety. This BMS board is ideal for solar energy storage, backup power systems, DIY battery packs, electric vehicles, power banks, and inverter systems using LiFePO4 cells. The board continuously monitors each cell voltage and controls charge/discharge current to prevent damage caused by overcharging, deep discharge, overcurrent, or short circuits. 🔹 Key Features Designed for 4S LiFePO4 (12.8V nominal) battery packs Continuous discharge current: 10A Overcharge protection Over-discharge protection Overcurrent protection Short-circuit protection Cell balancing function Compact and lightweight design Improves battery safety and lifespan 🔹 Technical Specifications Brand: TDT Battery Type: LiFePO4 (LFP) Series Configuration: 4S Nominal Voltage: 12.8V Maximum Charging Voltage: 14.6V Continuous Discharge Current: 10A Overcharge Protection Voltage: ~3.65V ± 0.05V per cell Over-discharge Protection Voltage: ~2.5V ± 0.1V per cell Balancing Function: Yes Short Circuit Protection: Yes Operating Temperature: -20°C to +60°C 🔹 Applications 12.8V LiFePO4 battery packs Solar storage systems UPS systems Inverter battery packs Electric scooters / small EVs DIY power backup systems Portable power stations 🔹 Wiring Instructions (Basic) B- → Battery Pack Negative B1 → Cell 1 Positive B2 → Cell 2 Positive B3 → Cell 3 Positive B4 → Cell 4 Positive P- → Output Negative P+ → Output Positive (Battery Positive) ⚠ Always connect balance wires in correct sequence to avoid damage. 🔹 Package Includes 1 × TDT 4S 12.8V 10A LiFePO4 BMS Board
TDT LiFePO4 LFP 4S 12.8V 20A Battery Management System
[Lithium Battery Protection Board] The TDT 4S 12.8V 20A LiFePO4 Battery Management System (BMS) is designed to protect and manage 4-cell LiFePO4 battery packs. It continuously monitors each cell’s voltage and current to ensure safe and stable operation. In addition, the BMS includes a balancing function, which helps maintain equal voltage across all cells. As a result, the battery pack delivers better performance and longer life. Moreover, the module provides multiple protection features, including overcharge, over-discharge, overcurrent, and short-circuit protection. Therefore, it prevents damage to the battery and improves reliability. Because of its compact design and efficient performance, this BMS is ideal for solar systems, backup power solutions, electric vehicles, and DIY battery packs. 🔹 Key Features Supports 4S LiFePO4 (LFP) battery packs Nominal voltage 12.8V 20A continuous discharge current Built-in cell balancing High reliability and stable operation Compact and easy to install Suitable for various battery applications 🔹 Protection Functions Overcharge protection Over-discharge protection Overcurrent protection Short-circuit protection Temperature protection (if supported) 🔹 Technical Specifications Parameter Specification Brand TDT Battery Type LiFePO4 (LFP) Battery Configuration 4S Nominal Voltage 12.8V Max Continuous Current 20A Balance Function Yes Application Lithium battery protection 🔹 Applications Solar battery systems DIY LiFePO4 battery packs Backup power systems Electric scooters and bikes Energy storage systems (ESS) 🔹 Package Includes 1 × TDT 4S 12.8V 20A LiFePO4 BMS Board
20S 2Amps Active Balancer Equalizer for Lithium Battery Pack
[Lithium Battery Protection Board] The NEEY 20S 2A Active Balancer Equalizer is an intelligent battery balancing module designed for 20 series Lithium battery packs. It uses active energy transfer technology to redistribute energy from higher-voltage cells to lower-voltage cells, ensuring the entire battery pack remains balanced during operation. Unlike passive balancers that dissipate excess energy as heat, this active balancing system transfers energy between cells, improving battery efficiency, performance, and lifespan. With up to 2A balancing current, the module quickly corrects voltage differences between cells, preventing issues such as cell overcharge, deep discharge, and imbalance. This makes it ideal for solar energy storage systems, electric vehicles, DIY battery packs, power walls, and industrial energy storage solutions. The NEEY active balancer provides reliable and efficient balancing to maintain stable battery pack performance in demanding applications. 🔹 Key Features Supports upto 20S Lithium battery packs Active energy transfer balancing technology Maximum 2A balancing current Improves battery efficiency and lifespan Reduces cell voltage imbalance Low heat generation compared to passive balancing Stable operation across wide temperature range Easy installation with long balance wires 🔹 Technical Specifications Parameter Specification Brand / Model NEEY 20S2A Battery Type Lithium Battery Strings 20S Balancing Method Active Balancing Maximum Balance Current 2A Operating Voltage Range 2.8V – 3.65V per cell Adjacent Cell Difference ≥0.1V (0.5–0.7A balancing) Maximum Balance Current 2A when voltage difference ≥0.2V Working Temperature -20°C to 60°C 🔹 Product Dimensions Size: 95 × 92 × 8 mm Weight: 135 g Balance Wire Length: 60 cm 🔹 Applications Solar energy storage systems LiFePO4 battery packs Electric vehicles (EV) E-bikes and electric scooters Energy storage systems (ESS) DIY lithium battery packs Industrial power systems 🔹 Package Includes 1 × NEEY 20S 2A Active Balancer Unit 1 × Balance Wire Harness (60 cm)
Out of stock19S 2Amps Active Balancer Equalizer for LifePO4 Lithium Phosphate Battery
[Lithium Battery Protection Board] An active balancer or equilizer, balance you cells all the time during discharge and charge and maintain same voltage level along with the whole battery, Provides a lot better back up and mileage than a normal battery pack. Connect the balancer along with the bms Module. Balancer does not do work of BMS, make sure BMS and balancer both are different. Balancer make battery balance and give more back up and mileage, and helps your battery to maintain the long life. You can use this balancer to Any ah battery like 12ah, 18ah or 50ah 100ah etc. Balancer Specification – Suitable – 19S LifePO4 48volt Operating voltage range: 2.8v to 3.65volt Balance current: 2Amps Max Adjacent voltage difference is 0.1V or more (current is about 0.5-0.7A); Adjacent voltage difference is above 0.2V (maximum balance current is 2A); The smaller the differential voltage, the smaller the balance current. other Info Product Dimensions – 92 x 85 x 8 mm Item Weight – 122grm Wire length – 60cm Package Include – 1. Balancer Unit 2. Balancer Wires
NEEY Active Balancer 24S 2A Lithium Battery Active Equalizer
[Lithium Battery Protection Board] NEEY Active Balancer 24S 2A – 24S Lithium Battery Active Equalizer The NEEY Active Balancer 24S 2A is an advanced battery active balancing module designed to improve cell voltage consistency and overall battery pack performance. It transfers energy between individual cells to help maintain a more balanced battery pack, reducing cell voltage differences and improving usable capacity, battery life, and overall system stability. With support for a wide 1.8V–4.5V cell voltage range, this active balancer is suitable for various lithium battery chemistries including LiFePO₄, Lithium-ion, and LTO battery packs. It is particularly suitable for high-capacity battery systems used in electric vehicles, e-rickshaws, e-bikes, solar energy storage, and other battery applications. The product specification identifies this model as a 24S Active Balancer with 2A balancing current, making it suitable for battery packs with up to 24 cells connected in series. ⭐ Key Features 24S Active Battery Balancer 2A balance current as specified for this model Active energy transfer between cells Supports cell voltage from 1.8V to 4.5V Compatible with LiFePO₄, Lithium-ion & LTO batteries High voltage measurement accuracy of approximately ±5mV Helps reduce cell voltage imbalance Improves battery pack performance and usable capacity Helps extend battery pack service life Low power consumption Suitable for high-capacity battery packs Ideal for EV, solar, and battery storage applications 📋 Technical Specifications Product Type: Active Battery Balancer Model: NEEY Active Balancer 24S 2A Item Code: 26001527 Category: Active Balancer Unit of Measure: PCS Series Support: Up to 24S Balance Current: 2A Cell Voltage Range: 1.8V–4.5V Voltage Accuracy: ±5mV Sleep Current: <0.1mA Working Current: Approx. 12mA Battery Chemistry: LiFePO₄, Lithium-ion, LTO Balancing Type: Active Energy Transfer 🔧 Applications LiFePO₄ Battery Packs Lithium-Ion Battery Packs LTO Battery Packs E-Rickshaw Batteries E-Bike Batteries Electric Vehicle Battery Packs Solar Inverter Battery Systems Energy Storage Systems High-Capacity Battery Packs 30Ah–300Ah Battery Applications DIY Battery Projects Battery Pack Maintenance & Optimization ⚡ Benefits of Active Balancing Active balancing transfers energy from higher-voltage cells to lower-voltage cells instead of simply dissipating excess energy as heat. This helps maintain better cell voltage balance and can improve the usable capacity and consistency of a multi-cell battery pack. 📦 Package Includes 1 × NEEY Active Balancer 24S 2A ⚠️ Important Note The supplied product information mentions 0–5.5A active balancing technology as a key feature, while the specific technical specification for this product lists the balance current as 2A. For this listing, the model-specific specification of 2A balance current should be used.
3 Series 20A 18650 Lithium Battery Protection Board 11.1V 12V 12.6V Good Quality
[Lithium Battery Protection Board] 3S 20A 18650 Lithium Battery Protection Board with Balance – 11.1V/12.6V The 3 Series 20A 18650 Lithium Battery Protection Board is designed for building and protecting 3S lithium-ion battery packs using 3.6V/3.7V cells such as 18650, 26650, and compatible lithium-polymer cells. It features automatic recovery, balanced charging, and 20A continuous charge/discharge capability. The board uses 10 low-resistance MOSFETs and provides approximately 100mA balancing current. ⭐ Key Features 3S lithium-ion battery protection board Suitable for 11.1V nominal / 12.6V fully charged battery packs Supports 3.6V/3.7V lithium-ion cells Compatible with 18650, 26650 and compatible Li-ion/Li-Po cells 20A maximum continuous discharge current 20A maximum continuous charge current Built-in 100mA balance function Automatic recovery after protection operation Integrated 10 low-resistance MOSFETs Suitable for compact DIY battery-pack construction Designed for applications such as drills, sprayers, LED lights and low-power inverters 📋 Technical Specifications Product Type: 3S Lithium Battery Protection Board / BMS Battery Configuration: 3 cells in series (3S) Compatible Battery: 3.6V/3.7V Li-ion cells Battery Pack Voltage: 11.1V nominal Full Charge Voltage: 12.6V Continuous Discharge Current: Up to 20A Continuous Charge Current: Up to 20A Balance Current: Approximately 100mA Balance Function: Yes Recovery Function: Automatic recovery MOSFET: 10 low-resistance MOS tubes Charging Voltage: 12.6V for the completed 3S pack Board Size: Approximately 46 × 60 × 3.4mm Compatible Cells: 18650, 26650 and compatible lithium-polymer cells 🔧 Applications 3S 18650 battery packs DIY rechargeable battery packs Electric drills Battery-powered sprayers LED lighting systems Low-power DC inverters Portable electronic projects Robotics and DIY power systems 🛠️ Wiring The balance connection points should be connected in the correct sequence according to the board markings: 0V → 4.2V → 8.4V → 12.6V Do not short-circuit the terminals or connect the cells incorrectly. ⚠️ Important Notes The 20A rating is the maximum continuous rating; actual usable current depends on cooling, wiring, MOSFET temperature and battery capability. For electric-drill applications, high-current cells are required. Ordinary low-current 18650 cells may not be capable of supplying the required starting current. Sources specify high-C-rate cells for drill applications. If cooling is insufficient, reduce the load current. For brushed DC motors, a suitable suppression capacitor may be used across the motor terminals to reduce voltage spikes, as recommended by the supplied product instructions. Cells used in the same 3S pack should be properly matched and have similar voltage and condition. This is a protection/balancing board, not a standalone 12.6V charger. Use an appropriate 12.6V lithium-ion charger. Connect the battery and balance wires exactly according to the PCB markings. 📦 Package Includes 1 × 3S 20A 18650 Lithium Battery Protection Board with Balance