If you like your iPhone cases a little more rugged for the added protection, and always wished that they could double as a battery pack as well, this new mophie case should be right up your alley. Called the mophie juice pack PRO, this rather massive case comes loaded with a honking battery (2500 mAh) that will be able to provide an extra 150% more power to your phone. Its Otterbox like exterior not only provides drop/impact/shock protection, but it’s also water resistant and dust proof. And like other juice pack cases, this one’s equipped with a standby switch, so you get to decide when the iPhone 4/4S actually gets charged. The mophie juice pack PRO is available now – black only – on mophie.com for $129. More images and info after the break.