LoPy and WiPy expansion board;

USB and LiPo battery powered.
FT234XD USB to serial converter.
LiPo battery charger (BQ24040 ), with options for 2 different charging currents (100mA and 450mA).
TPS2115A with reverse voltage protection.
MicroSD card slot.
3 female headers to easily plug in the WiPy (WiPy 1.0 and WiPy 2.0) or the LoPy.
JST style battery connector.
Power LED and charge status LED.
1 user LED and 1 user switch.
Battery voltage monitoring via the WiPy ADC.
Lots of jumpers to enable/disable features.
Dimensions: 65 x 50 x 12 mm