Sharper Image Rechargeable Battery Extender for iPhone 4S, 4, 3GS

Sharper Image Rechargeable Battery Extender for iPhone 4S, 4, 3GS
Battery extender pack works with iPhone and iPod Touch
Extend battery life with a 1600mA lithium polymer battery
Virtually double your charge with this battery charger extender
Click-Lock stand turns this battery extender pack into a hands-free stand
Position the battery extender for hands-free viewing
Take your battery charger/extender on planes, trains and car rides
Dock your iPhone or iPod Touch in the battery extender pack for long life
Battery extender pack Includes 12V car adaptor and AC adaptor