Tiny Powerbank for Bluetooth Headset
I made this tiny powerbank to extend the battery life of my bluetooth headset. The bluetooth headset has around 100 mAh and the powerbank is around 250 mAh. If the powerbank is charged with a normal android charger the battery gets to much current and starts to heat up. I charge it with a computer usb port, then it gets less current and does not heat up. The small battery came from a small broken drone.