Incipio OffGrid

Incipio touts its OffGrid case as weighing just 2 ounces and measuring 9.6 mm thick. While it's fairly affordable at $45, its 1,450 mAH battery is smaller (lower capacity) than some of its competitors'.

Note: This spring, Incipio will offer a new OffGrid case that has a removable battery, which will allow you to carry around a second (or third) battery and swap it in if necessary. We don't expect that product to be available till March, however.

Price: $45

See pricing for Incipio OffGrid from Amazon.com.