This battery backup will keep your smartphone charged up when needed. With a 2,000 mAh Li-Ion Grade A battery and a 5V/1A output it will give you an additional 8 hours of talk time. Includes a USB to Micro USB connecting cable which can recharge the battery backup or be used to charge up devices with a Micro USB input like Android Smartphones from Samsung®, Motorola®, HTC®, Nokia®, and others.