The TP-LINK TL-PB20100 portable 20100mAh power bank and phone charger features an ultra high capacity of 20100mAh that lets you charge a smartphone an enormous 5~7 times, and helps keep your devices running when you're away from a charging point. Dual USB ports (5V/2A) allow for charging two devices simultaneously. A built-in special circuit provides turbo speed charging and recharging. Key features : Ultra high capacity of 20100mAh Dual USB ports let you quickly charge two devices simultaneously Compatible with 5V input USB-charged devices Multiple safety protections Practical flashlight Six LED lights work as charge indicators to show battery level or charging status More than 500 recharge cycles over the life of the battery