This battery is not Apple certified so you get an error message each time you attach it to the phone. Considering the affordable price, it is worth it to me. The fit and finish is good. It is lightweight and does not add much to the phone (maybe double it). There is no easy way to turn the battery off but it does turn off at some point after the phone has been reading 100%. For the price, it is all things I can deal with so I can have that extra power for my phone when I need it.
Combining the convenience of a longer life backup battery and ultimate protection, you may now enjoy your new iPhone 5/5S with this hard PC back cover shell case which has a built-in rechargeable back up battery. 2 Piece detachable hard PC form-fitting back and frame cover with rubberized coating finish for extra shock absorbing, skid-proof, tear-resistant, anti-scratch, and anti-fingerprints protection. Built-in rechargeable battery with 2500mAh capacity doubles the battery life. Uniquely designed openings as virtual speaker box that redirect sound from the bottom of the iPhone to the front resulting in a richer, fuller sound quality. Full access to all buttons, ports, and cameras without the need to remove the case. Includes 1 USB to Micro USB cable for Charging. For iPhone 5/5S ONLY.