Griffin TuneJuice for iPhone Lithium-Ion (Li-Ion) rechargeable battery

Battery Backup for iPod and iPhone Recharge your iPhone or iPod anywhere

Get more out of your iPhone or iPod—more music, more video, more talk, more surfing. More than just a battery extender, TuneJuice recharges the battery on your iPhone or iPod using 4 AAA batteries (included in package).

Never cut short another conversation or song again; just plug in TuneJuice, and your iPhone or iPod battery starts to safely recharge—and keeps on playing. A must-have for air travel, camping, urban hiking, road trips or anywhere else you could face the ugly prospect of a dead battery.

Features
-Charges iPhone or any iPod with a dock connector
-Uses 4 AAA batteries (included)
-Hours more music, video, talk time, web access