Following Apple’s change to the new lightning connector it has taken some time for lightning accessories to appear. Battery cases are now appearing and below are just a few.
uNu’s DX Protective Case for iphone 5 costs $80 and will come in both black and white , with a 2300mAh battery built-in. It’s a slider case, with a removable top and a Lightning plug integrated into the bottom portion of the case.
Meridian iPhone 5 Battery Case costing a similar amount, from Lenmar is similar to uNu’s option. With a 2200mAh cell, it’ll be available in white and black, as well as metallic red.
ThirdRail’s Battery System for iPhone 5 has a removable battery that snaps in place and can be stacked with others for extra power. The battery is 1650mAh. This should cost $100.