The Juice Pack 3G fits your iPhone like a glove, covering the edges on the bottom half of the phone, while the top remains exposed. Fans of minimalist cases--or no cases at all--will appreciate the Juice Pack’s relatively slim profile. There’s also a Juice Pack to fit the original iPhone, but the 3G version forgoes the backwards dock connector of its predecessor in favor of a standard mini-USB jack with included cable for charging.