All products · 5 of 1440
Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Out of stock18650 4-Slot Smart Charger (Liitokala Lii-S4)
Independent 4-slot charger, Li-ion / NiMH, USB-C input, charge current selection.
Out of stockAA NiMH Rechargeable 2700 mAh (4 pc)
Eneloop-style AA NiMH cells, 2700 mAh, pre-charged. 500+ cycle life.
RC3563 Battery Internal Resistance Tester – Handheld Battery Analyzer
[Battery Capacity Tester] RC3563 Battery Internal Resistance Tester – High Precision Battery Resistance & Voltage Meter The RC3563 Battery Internal Resistance Tester is a professional handheld measuring instrument designed for accurate testing of battery internal resistance, battery voltage, and low-value resistance. Using the Kelvin 4-wire measurement method, it minimizes errors caused by lead and contact resistance, providing stable and precise readings. Featuring an LCD display, USB rechargeable operation, and a compact portable design, the RC3563 is suitable for testing Li-ion, LiFePO₄, NiMH, NiCd, Lead-Acid batteries, capacitors, resistors, and other low-resistance components. It is ideal for battery maintenance, EV battery inspection, manufacturing, laboratories, electronics repair, and DIY applications. ⭐ Key Features Simultaneous measurement of internal resistance and voltage High-precision Kelvin 4-wire testing technology Low-resistance measurement capability Clear LCD digital display Portable handheld design 5V USB rechargeable operation Stable and accurate measurement algorithm Suitable for lithium, nickel, and lead-acid batteries Suitable for capacitor and resistor low-resistance testing Ideal for laboratory, industrial, repair, and DIY applications 📋 Technical Specifications Product Type: Battery Internal Resistance Tester Model: RC3563 Measurement Type: Internal Resistance & Voltage Test Method: Kelvin 4-Wire Display: LCD Screen Charging Input: 5V DC Power Supply: Built-in Rechargeable Battery Supported Batteries: Lithium, LiFePO₄, Nickel, Lead-Acid Additional Function: Low Resistance Measurement Design: Handheld Portable Device 🔧 Applications 18650 Battery Testing 21700 Battery Testing Lithium Battery Testing LiFePO₄ Battery Testing Battery Pack Testing EV Battery Inspection UPS & Inverter Battery Testing Lead-Acid Battery Diagnostics Battery Manufacturing & Quality Control Electronics Repair & Servicing Laboratory Testing Capacitor Testing Low Resistance Measurement ⚠️ Precautions Ensure correct polarity when connecting the test probes. Do not short-circuit the test leads. Use only a 5V charging input. Handle the test clips carefully for accurate measurements. Keep the tester away from water and excessive humidity. Avoid extreme temperatures. 📦 Package Includes 1 × RC3563 Battery Internal Resistance Tester 1 × Kelvin 4-Wire Test Lead Set 1 × USB Charging Cable 1 × User Manual
EU Plug Universal Battery Charger For 18650 16340 14500 Li-ion Rechargeable Battery Charger
[Li-ion Rechargeable Battery Charger, Lithium Battery And Accessories] 🔋 Universal Li-ion Battery Charger for 18650, 16340 & 14500 Rechargeable Batteries (EU Plug) Intelligent Charging • Automatic Cut-Off • LED Charging Indicator • Wide Voltage Input • Safe & Reliable The Universal Li-ion Battery Charger is a compact and reliable charging solution designed for 3.7V rechargeable lithium-ion batteries such as 18650, 16340 (RCR123A), and 14500 cells. Featuring a European (EU) plug, this charger is ideal for home, office, laboratory, and travel use. The charger automatically detects the battery charging status and provides safe, intelligent charging with automatic cut-off when the battery reaches full capacity. The built-in LED status indicator displays Red/Orange while charging and changes to Green when charging is complete, ensuring convenient monitoring. Designed with built-in protection against overcharging, short circuits, and reverse polarity, this charger helps extend battery life while providing safe and efficient charging performance. Its spring-loaded battery slot accommodates multiple cylindrical Li-ion battery sizes, making it a versatile charger for hobbyists, technicians, and electronics enthusiasts. Note: This charger is designed only for 3.7V Li-ion rechargeable batteries. It is not compatible with LiFePO₄, NiMH, NiCd, or primary (non-rechargeable) batteries. ⭐ Features Universal charger for multiple Li-ion battery sizes Compatible with 18650, 16340 (RCR123A), and 14500 rechargeable batteries European (EU) AC plug Intelligent automatic charging control Automatic charging cut-off when battery is fully charged LED charging status indicator Red/Orange LED while charging Green LED when charging is complete Built-in overcharge protection Reverse polarity protection Short-circuit protection Compact, lightweight, and portable design Easy plug-and-play operation 📋 Technical Specifications Product Type: Universal Li-ion Battery Charger Plug Type: EU Plug Input Voltage: 100–240V AC, 50/60Hz Output Voltage: 4.2V DC Charging Current: Approx. 400mA–1000mA (depending on model/batch) Battery Chemistry: Lithium-Ion (Li-ion) Supported Battery Sizes: 18650 16340 (RCR123A) 14500 Charging Method: Constant Current / Constant Voltage (CC/CV) Charging Indicator: Red/Orange – Charging Green – Fully Charged Protection Features: Overcharge Protection Reverse Polarity Protection Short-Circuit Protection Body Material: Flame-Retardant ABS Plastic Color: Black 🔧 Applications Suitable for: 18650 Lithium-Ion Batteries 16340 (RCR123A) Batteries 14500 Rechargeable Batteries LED Flashlights Rechargeable Torches DIY Battery Packs Portable Electronic Devices Electronics Laboratories Hobby Projects Battery Maintenance Educational Projects 📦 Package Includes 1 × Universal Li-ion Battery Charger (EU Plug) ⚠️ Note Compatible only with 3.7V rechargeable Li-ion batteries. Do not use with LiFePO₄ (3.2V), NiMH, NiCd, or non-rechargeable batteries. Battery is not included. Charging current and charger appearance may vary slightly depending on the manufacturing batch.
XL4015 5A Constant Current / Voltage LED Drives Lithium Battery Charging Module
[Step Down Buck Converter] ⚡ XL4015 5A DC-DC Buck Converter Constant Current & Constant Voltage Lithium Battery Charging Module (75W) Adjustable Output • CC/CV Mode • Up to 5A Output • Ideal for Battery Charging & LED Driver Applications The XL4015 5A DC-DC Buck Converter Module is a high-efficiency step-down (buck) voltage regulator designed for applications requiring constant voltage (CV) and constant current (CC) operation. Based on the reliable XL4015 switching regulator IC, this module provides an adjustable output voltage from 1.25V to 36V with output currents up to 5A and a maximum output power of 75W. The module features independent adjustment for both output voltage and output current, making it ideal for charging lithium-ion batteries, LiFePO₄ batteries, lead-acid batteries, and NiMH battery packs. It can also be used as a high-power LED driver, laboratory power supply, solar charging controller, and various DIY electronics projects. Built-in current limiting, short-circuit protection, and over-temperature protection ensure reliable and safe operation. The onboard LED indicators clearly display whether the module is operating in Constant Voltage (CV) mode or Constant Current (CC) mode, making setup and monitoring simple. ⭐ Features Based on the XL4015 high-efficiency buck converter IC Adjustable constant voltage (CV) output Adjustable constant current (CC) output Output current up to 5A Maximum output power 75W High conversion efficiency up to 96% LED indicators for CV and CC modes Short-circuit protection Over-temperature protection Suitable for lithium battery charging Can be used as a high-power LED driver Compact PCB design with mounting holes 📋 Technical Specifications Product Type: DC-DC Buck Converter Module IC Model: XL4015 Converter Type: Step-Down (Buck) Input Voltage: 4V–38V DC Output Voltage: 1.25V–36V DC (Adjustable) Output Current: Adjustable, Up to 5A Maximum Output Power: 75W Operating Frequency: 180KHz Conversion Efficiency: Up to 96% Operating Temperature: -40°C to +85°C Operating Modes: Constant Voltage (CV) / Constant Current (CC) Current Limiting: Yes Short Circuit Protection: Yes (Current Limited) Over Temperature Protection: Yes Input Reverse Polarity Protection: No Mounting Hole Diameter: 3mm Input Connection: VIN+ / VIN- Output Connection: VOUT+ / VOUT- Dimensions: 50 × 26 × 12 mm Weight: Approx. 33g 🔧 Applications Suitable for: Lithium-Ion Battery Chargers LiFePO₄ Battery Chargers Lead Acid Battery Charging NiMH & NiCd Battery Packs Solar Charging Systems Wind Power Systems High Power LED Drivers Adjustable DC Power Supply Laboratory Power Supply DIY Electronics Projects Robotics Projects Arduino Projects Industrial Equipment Automotive Electronics 📦 Package Includes 1 × XL4015 5A Constant Current / Constant Voltage DC-DC Buck Converter Module ⚠️ Note This module is a step-down (buck) converter; the input voltage must always be higher than the desired output voltage. The module does not include reverse polarity protection. Please ensure correct input polarity before powering the module. Product images are for reference only. The actual product may vary slightly depending on the manufacturing batch.