1 of 2 people found the following review helpful
Verified Purchase(What is this?)
This review is from: Anker® 2400mAh MFI Apple Certified Premium Rechargeable Extended Battery Case for iPhone 5s, 5 [18-Month Warranty] (Wireless Phone Accessory)
This is a must have product for me as the battery is so poor on the iphone. I've had it a few months now and it works perfectly on my iPhone 5S with iOS 7.1
It has a lot more quality than the cheaper ones you can buy on ebay.
I can now use my iPhone constantly all day and not worry about the battery at all.