Overview No more frantic searching for an AC power outlet when your cellphone, tablet, or other mobile devices battery power is getting low. The UPB-05K2-1U Portable 5200mAh Mobile Power Bank is the perfect power solution when youre on the road, or stuck somewhere without convenient electricity. It fits comfortably in your pocket, purse, backpack or laptop bag to keep your e-reader, MP3 player, handheld game console or Bluetooth device operating when you need it. Just connect your device to the UPB-05K2-1Us USB-A port using the included USB Micro-B cable or another cable suitable for your device. Press the button to illuminate the LEDs that indicate the Mobile Power Banks battery capacity at a glance. Press the button twice to use the device as an LED flashlight. The portable UPB-05K2-1U provides up to 5V, 1A of power, and its 5200mAh capacity charges devices at maximum power up to 5.2 hours. It protects against short circuits, overvoltage, over-current, overcharges and overdischarges. Charge the Mobile Power Bank by connecting its USB Micro-B port to a USB charger or a computers USB-A port using the included cable. Press the button, and the four LEDs will blink or light solid in various combinations to indicate the battery level.