Keep and talking and charge your iPod/iPhone on the go! BluePack S2 extends your iPhone/iPod talk time up to 3.5 hours, 7 hours for video/ gaming or 36 hours for music via the exceptional 1000mA Lithium Polymer battery. With an included mini-USB cable, you never need to worry about running out of juice again wherever you are!BluePack S2 battery uses advanced rechargeable Lithium Polymer cell with added technology and components that avoids over- or under-charging. Innovative and compact in design, its lightweight features make it fit for your pocket, purse or briefcase. The high quality aluminum case also prevents your battery from scratches.