Since it 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 4/4S battery case for travel or business. The simple toggle switch allows for standby and charging mode so you only have to use the juice pack plus battery when you need it!

More than double the battery life.

Take full advantage of everything your iPhone has to offer, such as Web browsing, downloading apps, sending emails, or watching video without worrying about always having to recharge.

Featuring Apple's coveted "Works with iPhone" certification, this innovative smart battery case adds up to an additional 8 hours of talk time (up to 16 on 2G) or Web browsing to your iPhone 4/4S.

Fully functional. Fully protected.

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.

Don't give up any iPhone features or functionality. With the juice pack plus, you'll be able to easily access all of your controls and still get the speaker sound you're used. It also has acoustic sound enhancing speaker ports for a richer, fuller sound quality.

Added features for ease of use

The juice pack plus is full of features that were designed with you in mind. An included standby switch allows you to choose when you want your juice pack to charge and the included micro USB cable allows you to charge and sync to itunes.

To top it off, four LEDs on the bottom keep tabs on how much power is left in the juice pack plus battery. The LEDs also keep you updated on your juice pack charging status when it's plugged in.