... : Li-polymer batteryCapacity: 6800mAh/ 23WhInput:mini USB DC 5V ,1.0A (Max)Port 1 Output: 5.0V, 1APort 2 Output: 5V ,2.1A ... (Max)Size:112*73*17mmCompatibility:Port 1: Cell phone,iPhone,MP3/4,iPod,PSP,all ... and messy cords needed, portable size to carrying***********************Product Features:1, External power bank for Iphone, Ipod, Mobile phones, PDA, MP3 ...