Portable battery to charge mobile devices. Capacity: 8400mAh Input voltage and current input: 5V/1000mA Output voltage and current: 5V/1000mA, 1500mA Connector: 2xUSB (OUT)/microUSB (IN) Cable: USB-microUSB Charging the battery: USB port or AC wall charger with micoUSB plug Lifetime: 1000 cycles Extras: built in flashlight and LED Display with charging indicator