Maxboost via Amazon offers its Maxboost Atomic Air 2,200mAh iPhone 5 Battery Case in Black or White for $69.95. Coupon code "SDATOM50" cuts it to $34.97. With free shipping, that's $65 off list and the lowest total price we could find for either color. It features a 2,200mAh battery, Lightning connector, microUSB input, and LED battery level indicator.