Seeed energy shield for lipo batteries intelligent charging seeed studio 106030000 p the energy shield from seeed studio is a highly adaptable power system capable of accepting power from solar cells usb and via a dc jack your lipo battery will provide power when no other supply is connected and it will be charged when external power is available the board can even send power out of the usb to power an external device this is a must for your next arduino portable or off grid project p