External 1-cell 500mA li-po charger with micro-USB connector. For full specification please see the store.

Revision A schematics

Revision A layout seen from the top

Using the P2 connector it's possible to chain multiple chargers together and only power one. This requires soldering. Below is a picture of one possible setup. Don't forget to check the rating of the connectors and make sure you use a power supply that can supply at least 500mA per charger.