“So does the PowerSkin actually provide double the battery life for the iPhone 4? Well, that’s a resounding yes because we managed to fully charge a dead iPhone 4 back to 100%. Not ending there, we are able to charge the handset an additional 16% before tapping out the PowerSkin completely. And when it comes to charging the iPhone 4, it manages to do it at the same rate as if you’re using a regular wall charger. With its built-in 2,000 mAh battery, power users are pretty much guaranteed to get a solid day of usage – with no worries about losing any juice throughout the day.”

Complete Review @ www.phonearena.com