All products · 13 of 1440
Electronics, sensors, robotics kits, PC components, peripherals — everything Unik Systems carries, in one place.
Out of stockSoldering Iron Tip Set (5 shapes)
Replacement tips for 936/900M iron — chisel, conical, bevel, knife, fork.
26650 Battery Holder / Battery Spacer 2×1 – 26.3mm Bore Diameter
[Lithium Battery Holder] 26650 Battery Holder / Battery Spacer 2×1 – 26.3mm Bore Diameter The 26650 Battery Holder / Battery Spacer 2×1 is a cylindrical battery spacer designed to securely arrange 26650 lithium-ion battery cells while building multi-cell battery packs. Made from flame-retardant ABS+PC material, it provides a strong and stable structure while allowing air circulation around the cells. The holder features interlocking slots on the edges, allowing multiple spacers to be joined together to create different battery-pack sizes and configurations. After welding nickel strips, the assembled battery pack can achieve a solid and reliable structure without requiring additional connecting hardware. ⭐ Key Features Designed for 26650 cylindrical lithium-ion cells 2 × 1 configuration 26.3mm bore diameter Made from flame-retardant ABS+PC material High-temperature resistant construction Crack-resistant design Interlocking slots for connecting multiple spacers Allows flexible battery-pack configurations Provides mechanical support for battery cells Helps maintain proper spacing between cells Suitable for high-current battery-pack construction Helps improve battery-pack stability and reliability Allows airflow around the cells for heat dissipation 📋 Technical Specifications Product Type: Battery Holder / Battery Spacer Compatible Cell: 26650 cylindrical battery Configuration: 2 × 1 Number of Cells: 2 Bore Diameter: 26.3mm Material: Flame-retardant ABS+PC Construction: Interlocking modular design Mounting: Multiple spacers can be joined together Application: Lithium battery pack assembly Cell Type: Cylindrical Li-ion cells 🔧 Applications 26650 lithium-ion battery packs E-bike battery packs Electric scooter battery packs Electric vehicle battery packs Power-tool battery packs DIY high-current battery packs UPS battery systems Solar energy storage packs Portable power stations Robotics battery packs Custom lithium battery assemblies 🛠️ How to Use The spacer is designed to hold two 26650 cells in a 2×1 arrangement. Multiple spacers can be connected through the slots provided around the edges to create larger battery-pack configurations. For a complete battery pack: Cell → Spacer → Nickel Strip Welding → Additional Spacers → Battery Pack For mechanical support, spacers can be positioned at the top and bottom of the cells. Important: For each individual battery cell, 2 spacers are recommended—one at the top and one at the bottom. 💡 Advantages Simple Assembly: Easy to arrange cylindrical cells. Flexible Design: Multiple spacers can be interconnected to create different pack shapes. Strong Construction: Helps keep cells firmly positioned. Heat Dissipation: Provides spacing between cells and allows airflow. Reliable Battery Pack: Helps make the completed pack mechanically stable. Suitable for Complex Packs: Useful for custom battery configurations, including e-bike and high-current applications. ⚠️ Important Notes This product is only a battery holder/spacer; batteries are not included. The 26.3mm bore is intended for compatible 26650 cells. Check your actual cell diameter before purchase. Do not force oversized cells into the holder. Battery cells should be properly insulated and securely assembled. Use suitable nickel strip and an appropriate spot-welding method. Use a suitable BMS/protection system for the completed lithium battery pack. Battery cells should be properly matched before assembling a multi-cell pack. 2 spacers are recommended per individual cell, one on each end. Keep the battery assembly away from excessive heat, moisture and physical damage. 📦 Package Includes 1 × 26650 Battery Holder / Battery Spacer – 2×1, 26.3mm Bore Diameter Note: Battery cells, nickel strips and BMS are not included.
Passive Radiator Bass Diaphragm Rubber Speaker Vibration Plate for DIY Speakers
[Passive Radiator] 🔊 Oval, Square & Round Passive Radiator Bass Diaphragm Rubber Speaker Vibration Plate for DIY Speakers Deep Bass Enhancement • Passive Design • No External Power Required • Ideal for DIY Speaker Projects The Rubber Passive Radiator Bass Diaphragm is a high-quality auxiliary bass vibration plate designed to significantly improve the low-frequency response of speaker systems. Available in Oval, Square, and Round shapes with multiple sizes, this passive radiator enhances bass performance without requiring additional power or amplifier channels. Unlike conventional speakers, a passive radiator does not contain a voice coil or magnet. Instead, it utilizes the air pressure generated by the active speaker driver to vibrate, producing deeper, richer bass while minimizing distortion and unwanted cabinet resonance. Manufactured using premium rubber and durable ABS materials, these passive radiators provide excellent flexibility, durability, and long service life. They are ideal for upgrading Bluetooth speakers, portable speakers, multimedia speakers, subwoofers, soundbars, and custom DIY audio projects. Whether you're repairing an existing speaker or building a custom enclosure, these passive bass diaphragms help deliver powerful low-frequency performance while maintaining compact enclosure sizes. ⭐ Features Premium quality rubber passive radiator Available in Oval, Square & Round shapes Produces deep and powerful bass response No power supply or wiring required Improves low-frequency performance Reduces speaker distortion Durable rubber suspension Lightweight and compact design Easy to install Ideal for DIY speaker upgrades and repairs 📋 Technical Specifications Product Type: Passive Radiator Bass Diaphragm Material: Rubber + ABS Plastic+Metal Shape: Oval / Square / Round (Depending on Selected Variant) Available Sizes: Multiple Sizes (2040 to 6090 Series) Operation: Passive (No Voice Coil or Magnet) Power Requirement: None Installation Type: Speaker Cabinet Mount Application: Low Frequency Bass Enhancement Color: Black 🔧 Applications Suitable for: Bluetooth Speakers Portable Speakers DIY Speaker Projects Multimedia Speakers Home Audio Systems Bookshelf Speakers Soundbars Subwoofers Wireless Speakers Audio System Repairs Custom Speaker Cabinets DIY Audio Enclosures 📦 Package Includes 1 × Passive Radiator Bass Diaphragm (Size & Shape as Selected) ⚠️ Note This is a passive radiator only and does not contain a voice coil, magnet, or electrical terminals. Product images are for reference only. The actual product may vary slightly in appearance depending on the selected size, shape, or manufacturing batch.
Out of stockWS2812B 144 LEDs/m RGB Addressable LED Pixel Strip Light 5V DC Programmable IP65 Waterproof
[RGB LED Strip] Product Description Illuminate your space with the 144 Addressable WS2812B LED Strip (5V, IP65 Waterproof) — a high-quality, vibrant, and flexible lighting solution designed for both indoor and outdoor applications.This LED strip delivers brilliant RGB colors and individually addressable LEDs, allowing you to create dynamic light effects and custom animations for any occasion. The IP65 waterproof rating ensures reliable performance even in dusty or humid environments, making it ideal for home decor, commercial lighting, events, and DIY projects.Its adhesive backing allows for quick installation on clean surfaces, making it a perfect choice for hobbyists, professionals, and decorators. With 144 LEDs per meter, this strip provides exceptional brightness, flexibility, and color control for artistic displays, mood lighting, or architectural highlights. Key Features 🌈 Addressable Design Each LED is individually controllable, allowing you to produce stunning lighting effects, animations, and color patterns. Perfect for creative lighting projects and synchronized displays. 💧 IP65 Waterproof Protection Built to withstand dust and light water exposure, this LED strip ensures long-lasting durability in both indoor and outdoor environments. 🔆 Vibrant RGB Colors Enjoy rich and vivid RGB color combinations — from bold, dynamic hues to soft ambient tones — to match any mood or theme. 🧩 Easy Installation The flexible strip comes with a strong adhesive backing. Simply peel and stick it to any clean, dry surface for quick setup without tools. ⚙️ Versatile Applications Ideal for home decoration, outdoor landscaping, parties, events, art installations, and signage. Its flexibility makes it suitable for various shapes and surfaces. Specifications Specification Description LED Type WS2812B LED Quantity 144 LEDs per meter Input Voltage 5V DC Waterproof Rating IP65 Control Method Individually Addressable Color RGB (Red, Green, Blue) Strip Length 1 Meter Power Consumption Depends on brightness and color settings Weight 150 g(Approx) Installation Adhesive backing Applications ✨ Enhance your outdoor landscape with vibrant, programmable lighting effects. 💡 Highlight indoor architectural elements or furniture with accent lighting. 🎉 Create dynamic effects for parties, weddings, or events to match the ambiance. 🎮 Upgrade your home theater or gaming setup with immersive backlighting. 🏢 Use in shops or signage displays for eye-catching illumination and visual impact. Package Includes 1 × WS2812B 144 LEDs/m RGB Addressable LED Pixel Strip Light 5V DC Programmable IP65 Waterproof
2 x 32140 / 33140 Battery Holder with 33MM Bore Diameter
[Lithium Battery Holder] 32140 / 33140 x 2 Battery Cell Spacer/Holder is a cylindrical battery spacer, made of flame retardant ABS+PC materials, with high-temperature resistance and crack resistance. There are slots on the edge of the holder, that can be combined into many different sizes and shapes of the battery pack; after welding nickel tabs, the pack can pass the vibration test without any other connecting device. Make your battery pack Solid and Reliable! Note!! Every Single battery cell needs 2 Spacers one up and one down buy it accordingly. Features : There are slots on the edge of the holder to combine them into many different sizes and shapes of the battery pack. Application: Design for Radiating Complex Battery Packs. Safe and Stable, Perfect Build for eBike! Item Type: Battery Holder Model Name 32140 / 33140 radiating battery spacer Material: ABS/PC (Remarkable Flame Retardant Plastic) Bore Diameter [B] (mm) 33MM Application Design for Radiating Complex Battery Packs. Safe and Stable, Perfect Build for eBike Length (mm): 73 Width (mm): 35 Height (mm): 9mm Shipping Weight 0.008 kg Shipping Dimensions 10 × 7 × 1.5 cm Advantages: Very simple to operation Very flexible, it is easy to assemble any type of battery packs Radiating during high rate discharge. Makes your battery pack Solid and Reliable! Package Includes: 1 x 2 x 32140 / 33140 Battery Holder with 33MM Bore Diameter
2 x 32650/32700 Battery Holder with 32.35MM Bore Diameter
[Lithium Battery Holder] 32650 x 2 Battery Cell Spacer/Holder is a cylindrical battery spacer, made of flame retardant ABS+PC materials, with high-temperature resistance and crack resistance. There are slots on the edge of the holder, that can be combined into many different sizes and shapes of the battery pack; after welding nickel tabs, the pack can pass the vibration test without any other connecting device. Make your battery pack Solid and Reliable! Search Our Others Products: Click Here Note!! Every Single battery cell needs 2 Spacer for one up and one down buy it accordingly. Features : There are slots on the edge of the holder to combine them into many different sizes and shapes of the battery pack. Application: Design for Radiating Complex Battery Packs. Safe and Stable, Perfect Build for eBike! Advantages: Very simple to operation Very flexible, it is easy to assemble any type of battery packs Radiating during high rate discharge. Makes your battery pack Solid and Reliable! Package Includes: 1 X 2 x 32650/32700 Battery Holder with 32.35MM Bore Diameter
1260110 3.7V 10000mAh Lipo (Lithium Polymer) Rechargeable Battery
[LiPo Cell] 3.7V 10000mAh Lithium Polymer (Li-Po) Rechargeable Battery – Model 1260110 Being a Lithium Polymer (Li-Po) rechargeable battery, this is a high-capacity, lightweight battery designed for applications where compact size, high energy density and good capacity-to-weight ratio are important. This 3.7V 10000mAh Li-Po battery uses a solid polymer electrolyte and is suitable for DIY and commercial applications such as power banks, GPS devices, MP3 players, FM radios, Bluetooth speakers, IoT devices and other portable electronics. This battery is Model 1260110, Grade A quality, certified and designed for high-performance rechargeable applications. ⭐ Key Features High-capacity 10000mAh rechargeable Li-Po battery 3.7V nominal voltage Maximum charging voltage 4.2V Lightweight and sleek design High specific energy and energy density Excellent capacity-to-weight ratio Flexible form factor Compact size for portable applications Grade A quality rechargeable cell Suitable for DIY and commercial applications Useful for portable electronics and battery-powered projects 📋 Technical Specifications Model Number: 1260110 Battery Type: Lithium Polymer (Li-Po) Type: Rechargeable Battery Nominal Voltage: 3.7V Maximum Charge Voltage: 4.2V Capacity: 9200mAh(Approx) Battery Chemistry: Lithium Polymer Size: 110 × 60 × 12mm Quality: Grade A Form Factor: pouch cell 🔋 Battery Characteristics Lithium Polymer batteries are known for their lightweight construction, high energy density and flexible form factor. The pouch-style construction allows the battery to be designed in various shapes and sizes, making it suitable for compact electronic devices where space and weight are important considerations. 🔧 Applications 1. Portable Power Banks External battery packs Smartphone and tablet charging systems USB-powered portable devices 2. Medical Devices Portable medical equipment Portable monitors Battery-powered medical devices 3. IoT Devices Wireless sensors Compact IoT devices Low-power wireless electronics 4. Uninterruptible Power Supplies (UPS) Small-scale portable UPS systems Backup power applications 5. DIY Electronics DIY power banks Bluetooth speakers Portable audio projects GPS projects MP3 players FM radios Custom rechargeable battery packs 🛠️ Charging & Usage Use a charger specifically designed for single-cell 3.7V Li-Po/Li-Ion batteries. The maximum charging voltage is 4.2V. Do not connect the battery directly to a 5V supply. Use an appropriate charging/protection circuit for safe operation. Avoid short-circuiting, puncturing, crushing or physically damaging the pouch cell. 📦 Package Includes 1 × 3.7V 10000mAh Lithium Polymer Rechargeable Battery Model: 1260110 ⚠️ Safety Precautions Do not overcharge or over-discharge the battery. Do not short-circuit the battery terminals. Do not puncture, bend excessively, crush or open the battery. Keep away from excessive heat, fire and direct flame. Use a suitable Li-Po charging module with appropriate protection. Inspect the battery before use; do not use if swollen, damaged or leaking. Store in a cool and dry place when not in use. Keep away from children and pets.
Out of stock3.7V-4V Capsule Shape COB LED Light Cool White
[COB LED] This Chip on Board COB Led Light is very small and innovative product, it comes in many different Shapes and Sizes. Its mostly used where the thickness of the product is very important consideration. These led comes with aluminum metal back which act as heat dissipating area for the Led,as these led got hot while running. Application: Car lights House lighting Work lamps Decor lights Specifications: Input Voltage 3.7V-4V Max Input Voltage 4V (More than 4V Voltage will completely damage the product) Light Type COB LED Material Aluminum & Silicone rubber Color Cool White Thickness 2mm Plate Dimensions (L x B x H) 74 x 22 x 2mm Dimensions of Led Area (L x B x H) 60 x 17 x 1mm Weight 2gm Package Includes: 1 x 3.7V-4V Capsule Shape COB LED Light Cool White.
![3.7v – 4V Flower Shape COB led light [ Color – Cool White ] — Power & Components](/products/3-7v-4v-flower-shape-cob-led-light-color-cool-white/front.webp)
Out of stock3.7v – 4V Flower Shape COB led light [ Color – Cool White ]
[COB LED] This Chip on Board COB Led Light is a very small and innovative product, it comes in many different Shapes and Sizes. Its mostly used where the thickness of the product is a very important consideration. This led comes with an Aluminium metal back which acts as a heat-dissipating area for the Led, as these led got hot while running, but for the safety purpose we will recommend you to attach a metallic heat sink with it or paste it on the metal surface. Plate Dimensions ( L x B x H ):- ~74mm X ~22mm X ~2mm. Name of character/shape/letters on COB plate: SHAPE Fan Blade Dimensions of Led Area ( L x B x H ) :- ~62mm X ~18mm X ~1mm. Thickness:- 2mm. Input Voltage:- 3.7v – 4V. Max Input Voltage:- 4v (More than 4v Voltage will completely damage the product ) Aluminum back as a heat sink. Package Includes: 1 x 3.7v – 4V Flower Shape COB led light [ Color – Cool White ]
130mm PVC Heat Shrink Sleeve Blue for Lithium Cell Battery Pack (In Meters)
[Sleeves] 130mm Blue PVC Heat Shrinkable Lay Flat Tube for Battery Pack The 130mm Blue PVC Heat Shrinkable Lay Flat Tube is designed for safely covering and insulating DIY battery packs, lithium-ion battery packs, LiFePO₄ battery packs, and other electronic assemblies. Heat shrink tubing provides an additional protective layer around the battery pack, helping prevent accidental short circuits, abrasion, dust, and moisture exposure while giving the finished battery pack a clean and professional appearance. The lay-flat construction makes the sleeve easy to cut and position around battery packs of different shapes and sizes. When heated using a suitable heat gun, the PVC material contracts around the battery pack to provide a snug and secure covering. For improved durability, multiple layers can be used on battery packs with sharp corners or edges. A thin foam layer may also be placed around the battery pack before shrinking to help reduce stress and cracking over time. ⭐ Key Features 130mm lay-flat PVC heat shrink sleeve Blue color Designed for battery pack covering and insulation Helps protect against accidental short circuits Provides a clean and professional battery pack finish Flexible and easy to cut Heat-shrinkable PVC construction Suitable for single or multiple-layer applications Ideal for DIY battery pack assembly 📋 Technical Specifications Product Type: PVC Heat Shrinkable Lay Flat Tube Width: 130mm Color: Blue Material: Poly Vinyl Chloride (PVC) Shrinkage: Approx. 9%–21%, depending on size Tensile Strength: ≥4000 Pa/m² Form: Lay Flat Tube / Sleeve Application: Battery Pack Covering & Insulation 🔧 Applications 18650 Battery Packs 21700 Battery Packs Lithium-Ion Battery Packs LiFePO₄ Battery Packs DIY Battery Packs Electric Bicycle Batteries Electric Scooter Batteries Power Bank Assembly Portable Power Stations Battery Module Insulation Electronic Assembly Protection ⚠️ Usage Precautions Use a suitable heat gun for shrinking. Apply heat evenly around the sleeve to avoid overheating. Do not apply excessive heat directly to lithium battery cells. Ensure the battery pack is properly insulated before shrinking. Measure the battery pack before selecting the sleeve size. 📦 Package Includes 1 × 130mm Blue PVC Heat Shrinkable Lay Flat Tube for Battery Pack
18650 2×1 Battery Cell Spacer Holder
[Lithium Battery Holder] These Battery Cell Spacer Holders are made for 18650 Li-ion batteries. It is made of flame retardant ABS+PC materials. The holders have features like high-temperature resistance and crake proof. Every Single battery cell needs 2 Spacer for one up and one down buy it accordingly. There are slots on the edge of the holder to combined them into many different sizes and shapes of the battery pack. Features: Compatible Battery Size: 18650 Li-ION It is very simple to operate and it is flexible. It is easy to assemble any type of battery packs. It makes your battery pack Solid and Reliable. Note: Battery is not included, you need to buy it separately. Package Includes: 1 x 18650 2×1 Battery Cell Spacer Holder.
![3.7v – 4V Three Diamond shape COB led light [ Color – Cool White ] — Power & Components](/products/3-7v-4v-three-diamond-shape-cob-led-light-color-cool-white/front.webp)
Out of stock3.7v – 4V Three Diamond shape COB led light [ Color – Cool White ]
[COB LED] Description This Chip on Board COB Led Light is a very small and innovative product, it comes in many different Shapes and Sizes. Its mostly used where the thickness of the product is a very important consideration. This led comes with an Aluminium metal back which acts as a heat-dissipating area for the Led, as these led got hot while running, but for the safety purpose we will recommend you to attach a metallic heat sink with it or paste it on the metal surface. Plate Dimensions ( L x B x H ):- ~74mm X ~22mm X ~2mm. Name of character/shape/letters on COB plate: SHAPE Diamond Dimensions of Led Area ( L x B x H ) :- ~60mm X ~14mm X ~1mm. Thickness:- 2mm. Input Voltage:- 3.7v – 4V. Max Input Voltage:- 4v (More than 4v Voltage will completely damage the product ) Aluminum back as a heat sink. Package Includes: 1 x 3.7v – 4V Diamond shape COB led light [ Color – Cool White ].
![3v-3.7V Round COB led Light [ Color – Cool White ] — Power & Components](/products/3v-3-7v-round-cob-led-light-color-cool-white/front.webp)
3v-3.7V Round COB led Light [ Color – Cool White ]
[COB LED] This Chip on Board COB Led Light is very small and innovative product, it comes in many different Shapes and Sizes. Its mostly used where the thickness of the product is very important consideration. These led comes with aluminum metal back which act as heat dissipating area for the Led, as these led got hot while running. Diameter:- 50mm Thickness:- 2mm Input Voltage:- 3V- 3.7v Max Input Voltage:- 4v (More than 4v Voltage will completely damage the product ) Aluminum Back as a heat sink. Double Ring Led Light.