Almost double your iPhone's battery life
Slip your iPhone onto the juice pack air's 30-pin connector and close the case. It's now connected to a built-in rechargeable battery that can greatly increase your reserve of power — enough for 6 additional hours of talk or Internet use, or up to 36 more hours of audio playback. You can set the juice pack air to keep your iPhone continuously charged, or with a button press recharge your iPhone quickly when you need it.
An all-access case
The juice pack air has a USB charging cable that can connect to a computer or USB-compatible power adapter. And good news — you can sync your iPhone through the air's charging cable. Integrated pass-through buttons let you control volume, mute, and power on/off. An included adapter lets you plug your headphones into your device through the case.