I go into the Mall to the Apple Store. The line is like 2 hours long to get a new battery. So, I go to, "Mr. Phone Fixit," He replaces the older battery in my i5s in 5 minutes for $30, and guarantees that the battery he is putting in is the exact same battery that came with the phone, and the same one that Apple is putting in. I am now using the i5S as an iTouch. I now own an SE as my phone. The real problem is not the battery at all! The real problem is that the A7, and A8 processors cannot handle the new technology needed to run the new iOS 11.2.5! Replacing the battery does not give a longer battery life, and does not make the phone faster. It does give a longer life to a phone, the i5S, that I bought 1 year ago, and was made inoperable by me succumbing to trusting Apple to provide me with an iOS update that will work fine in my phone.