561150 290mAh 3.7V Battery with Red Black Wire for DIY Electronics Replacement

Description

Battery model: 561150
Capacity: 290mAh / 1.07Wh
Rated voltage: 3.7V
Charge limit voltage: 4.2V
Battery type: Li-ion Polymer (Grade A cells)
Connection type: Red and black wires (positive and negative) – no pre-attached connector
Dimensions: 5mm (Thickness) × 11mm (Width) × 50mm (Length)
Wire length: approx. 50mm (red + black)
Package include: 1 x battery
Power your DIY electronics projects with this 561150 290mAh Li-ion Polymer battery. The 561150 format (5mm thick × 11mm wide × 50mm long) is a compact, rectangular lithium-polymer cell commonly used in small portable devices, wearable electronics, IoT sensors, mini RC vehicles, Bluetooth devices, and custom battery packs. This battery comes with pre-attached red (positive) and black (negative) wires — no connector is included, allowing you to solder or connect it directly to your project’s power input. The 290mAh capacity at 3.7V nominal voltage (4.2V full charge) provides reliable power for low-power applications. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified for safety.
Why Choose This 561150 Battery for Your Projects: This battery is designed for makers, engineers, and repair technicians who need a compact, reliable power source. The 561150 size is a popular format for replacing worn-out batteries in small devices or building custom power solutions. The red and black wires make integration straightforward — simply connect red to positive (+) and black to negative (-) on your circuit. No connector means you can solder directly to your PCB, use a JST connector of your choice, or connect via terminal blocks. Common applications include: replacing batteries in Bluetooth earphones, smart watches, fitness trackers, mini RC cars, small sensors, portable game console mods, and custom battery packs for Arduino or Raspberry Pi projects. The 290mAh capacity provides approximately 2-3 hours of operation for Bluetooth earphones, 1-2 days for low-power sensors, and 15-20 minutes of run time for mini RC cars. Always verify polarity before connecting — reversing the wires will damage the battery and your device. The red wire is positive (+), the black wire is negative (-), and this color coding is standard across the industry.
Compatibility Note: This is a general-purpose battery, not a direct replacement for a specific commercial device. Before purchasing, verify your device’s voltage requirement (3.7V nominal, 4.2V max charge), available physical space (5×11×50mm), and connection type (wires for soldering — no connector included). Measure your original battery’s dimensions and check polarity orientation before connecting. This battery is suitable for devices that use a 561150 or similar size cell. Not compatible with devices requiring higher voltage, different battery chemistry, or dimensions larger/smaller than 5×11×50mm.