via gearpatrol.com
The PowerSkin offers a second full charge for the iPhone, doubling your use time. Yes, it may be bulky in comparison to other streamlined cases, but considering the extra Li-Ion it packs, the size is easily manageable. We found ourselves throwing it into our bag each day instead of using it as our full-time case. Then putting it into service when running somewhere after work with our battery in the red and no time to plug into a charger. Pair the two and in a few minutes you’re good to go. If you’re a heavy traveler consider the PowerSkin a must-have. $70