So Apple's take is probably: A bunch of people get mad when their iPhones stop working, start running slow, etc; research data shows that when they need a battery replaced, they're more likely to go to the local third party (non-authorized) repair shop and get it replaced. We have no idea how skilled or unskilled these repair shops are, even if they use genuine Apple batteries. Our best bet for maintaining the reputation of our product is to make sure only Genius bar or AASP staff install the batteries and run the necessary diagnostics post-install.<p>I don't agree that they should be doing the battery authentication thing, replacing your battery is pretty easy and simple; but you have to look at this from Apple's standpoint:<p>Yes, Louis Rossmann runs a repair shop that is better than the Genius bar in every way and, should he join Apple, all of their repairability issues would disappear overnight. The issue is that many (most likely a majority) of local computer repair shops that get asked "can you fix this battery error on my iPhone" aren't on par with Louis Rossmann and will make mistakes such as improper installation, not re-sealing the phone for water resistance, using non-genuine batteries, etc. Apple could, by all means, make the process easier, cheaper, and more idiot-proof, but that would require engineering efforts. The best course of action, both for making money from repairs and not losing money to engineering and possible product changes ("don't sacrifice form for function", at least under Jony Ive), is to get the software to verify that Apple had complete control over the replacement battery from factory to phone.