Product Features: Rechargeable Li-Polymer 8000mAh battery. This slim, lightweight 8000mAh rechargeable battery is ideal for travelers to charge their mobile electronic device in any case. The compact and elegant design of the battery makes it easy to carry in your bag or pocket. It can charge smartphones and iphones up to 4 times or Tablets up to 2 times (depending on the battery capacity of the device). To check the battery status, touch the battery body and 4 LEDs will show the remaining power. This RIVAPOWER battery can be charged and discharged more than 500 times and has a built-in USB - micro USB cable, so you do not have to worry if you have forgotten the cables. With protection against overcharging, overcharging, overvoltage, short circuit and automatic on / off. * Compatible with all popular models of smartphones, Tablets and other mobile devices. * DC input: 5.0V / 2A USB microphone. * DC output: USB 5.0V / 2A for charging speed of mobile devices.