... -discharge,over-current,over-voltage,short-circuit,over-load,etc. battery power bank with USB connectors and led lights for portable ... ,MP4,PSP,NDS etc.Compatible with all USB interface charging equipments. Operating environment:-10°C~45°C/45~75%RHStorage environment ... operation,only one button realizes all the functions; Ultra thin battery power bank with USB connectors and led lights for portable ...