iPhone 5 owners aren't exactly hurting for battery life, but what if you could double up the endurance and protect your handset at the same time? Mophie's just released the Juice Pack Air promising it'll do just that thanks to a 1,700 mAh backup battery embedded in the edge-to-edge case, only two weeks after launching the slender Juice Pack Helium with a 1,500mAh battery. On top of an extra 10 hours of 3G talk time and edge-to-edge protection, Mophie's touting li
