... Safety protection: over-charge, over-discharge,over-current,over-voltage,short-circuit,over-load,etc. battery power bank with USB connectors ... Micro USBOutput port:Single USB Power indicator:4 lightsRecycling time:≥500timesSafety protection: over-charge, over-discharge,over-current,over ... one button realizes all the functions; Ultra thin battery power bank with USB connectors and led lights for portable ...