The Mophie Juice Pack on its own weighs in at 3 ounces and measures at 2.4×4.75x.75 inches and latches on to your iPhone. Once connected you get 250 more hours of standby, 24 more hours of audio playback, 8 hours of additional talk time, and 7 hours of Video playback time, according to Mophie.
Initial impressions are good, Vincent says that it doesn’t make it any less comfortable to hold or carry the iPhone upon first impression, which is good. One thing Mophie advertises is that its units are sold with a fully charged battery, but Vincent’s unit arrived with only about a 75% charge.
One thing Vincent really liked, and I like from the photos, is that just like your MacBook Pro there is a battery meter on the back with LED lights representing the charge and a test button, so you can quickly check how much battery life you have left. The Mophie Juice Pack leaves the buttons on the side open, doesn’t cover the top, and has a cut out for the camera. Furthermore, the speakers are left open and it connects to charge and to sync via a standard dock connector, so you don’t have to remove the Juice Pack to charge it, your iPhone, or to sync the iPhone with your computer.