Need even more battery power for your iPhone 4? The mophie juice pack plus iPhone 4 Battery Case has Mophie's largest juice pack battery which extends the battery life of your iPhone for hours! The juice pack iPhone charger case plus also provides a comfortable ergonomic design with the complete protection of a dual-injected hard shell case with protective rubberized band. Since this batter iPhone case is designed to more than double the time you have to Rock, Talk, Surf and Send with your iPhone 4, the mophie juice pack plus is the ultimate iPhone 4 battery case for travel or business. 

• 2000 mAh capacity, advanced battery technology delivers an incredible amount of “juice” in a small form factor, more than doubling battery life.
• Features a simple toggle switch allows for standby and charging mode so you only have to use the juice pack plus battery when you need it!
• Charge and sync your iPhone to iTunes without removing it from the juice pack plus by using the included USB cable.
• The juice pack plus provides a comfortable ergonomic design with the complete protection of a dual-injected hard shell case with protective shock-proof rubberized band.
• The integrated LED status indicator on the bottom of the battery iPhone case tells you exactly how much juice is left at the push of a button. It also indicates the charging status so you know before you go.
• The battery iPhone case design acts as a virtual speaker box, redirecting sound from the bottom of the iPhone 4 to the front, resulting in a richer, fuller sound quality.

iPhone 4S 
iPhone 4 (AT&T,Verizon,Sprint)