Mophie’s latest iPhone case with built-in battery is one big and rugged beast. The Mophie Juice Pack Pro starts off with a massive 2500 mAh battery that can charge your iPhone 4 or 4S from empty to full and still have left over juice. Next they strapped on a beefy case that looks like something Otterbox would make. This battery case combo seems well suited for someone working in construction or on an oil rig. The Mophie Juice Pack Pro is perfect for the person in your life who breaks things and forgets to charge their phone. Yours for about $130 here.