These are very slim, extremely lightweight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 4000mAH! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized Lithium Polymer charger.
Battery includes built-in protection against over-voltage, over-current, and minimum voltage. Please use caution when using this battery in wearable projects.
1 x Lipo Rechargeable Battery 3.7V 4000mAH KP-357090