Apple's iPad Air is the lightest full-size tablet on the market. But despite dropping its weight to a scant 1-pound, the slate's battery life is as impressive as every. Over Wi-Fi the Air lasted a solid 11 hours and 51 minutes. What's more, the tablet ran for 10 hours and 47 minutes on Verizon's 4G LTE network. The slate's marathon battery life is all the more impressive given the fact that it features a faster 64-bit A7 processor, making it the speediest iPad ever.