2000 mAh rechargeable lithium ion Grade A battery is enough to charge smartphones, MP3 players and more. Reusable power bank charges via USB cable (included) which can be used to recharge the battery backup or to charge up devices with a Micro USB input such as Android smartphones (Samsung®, Motorola®, HTC®, Nokia®, and others). Red LED light indicates while charging. Includes split metal key ring. Input: 5V/500mA. Output: 5V/1000mA. Media device not included.