Mophie Juice Pack Air
The two biggest complaints about Apple's gift to communication and mobile Internet browsing is that there never seems to be enough battery life, and it's all too easy to break. Mophie addresses both problems in one elegant package with the Juice Pack Air. The case/battery adds up to six hours of talk time or web browsing and up to 270 hours of standby time. It also keeps the phone powered for up to nine hours of video and 36 hours of audio. Its hard shell protects the back and sides of the iPhone, though there's no protection for the screen. Heavier users may want to also look at Mophie's Juice Pack Plus, which offers the same protection with more battery power, albeit in a thicker package.