“The first thing you’d want for your iPhone 4 is a case and the second thing is usually an extra external battery. The PowerSkin for iPhone 4 silicone case with built-in battery kills two birds with one stone. The PowerSkin for iPhone 4 is a battery pack wrapped in a non-slippery silicone rubber skin. The battery has 2000mAh in capacity and can easily double your iPhone 4′s runtime.”

Read the compete article at www.mobiletechreview.com