Bought a used iPhone 5 and discovered that battery wouldn’t last 6 hours no matter what. Called Smartphone Mechanics again and 20 minutes after he arrived, I was all ready to go. Thomas explained to me that the batteries you buy on Flee-Bay and from other dealers are junk and he won’t sell that quality. When he had the original battery out of my phone I compared it to the new one he was about to install and lo-and-behold, it seems to be a genuine Apple battery. For the same price as a cheap imposter. No need to go anywhere else. Thomas is da man!