Jason Koebler ( tweet ):
A protracted nightmare scenario for independent iPhone repair companies has come true: Apple has tied batteries to specific iPhones, meaning only it has the capability to To perform an authorized battery replacement on the latest versions of iPhones, two independent experiments have been found.
Battery replacement is among the most common repairs made by Apple and by independent repair companies. This is because lithium-ion batteries eventually lose the ability to hold a charge, which will eventually render the phone unusable. Replacing the battery greatly extends the life of the phone: Apple CEO Tim Cook acknowledged earlier this year that battery replacement has resulted in fewer purchases of new iPhones, affecting Apple's bottom line.
It is important on many levels, as on the iPhone XS, XS Plus and XR, that any battery change that is not carried out by Apple will cause the phone's settings to say that the new battery needs “Service.”
Craig Lloyd (MacRumors):
Simply put, Apple locks batteries for its iPhones from the factory, so every time you replace the battery yourself ̵1; even if you use a genuine Apple battery from another iPhone – it will still provide you "The Service "message. The only way around this is – you guessed it – paying Apple money to replace the iPhone battery for you. Presumably, their internal diagnostic software can reverse the magic bit that resets this "Service" indicator. But Apple refuses to make this software available to anyone other than itself and Apple Authorized Service Providers.
Our friend Justin notes that there is a Texas Instruments microcontroller on the battery itself that provides information to the iPhone, such as battery capacity, temperature and how much time it fully discharges. Apple uses its own proprietary version, but pretty much all smartphone batteries have some version of this chip. The chip used in newer iPhone batteries includes an authentication feature that stores the information to connect the battery to the iPhone's logic board.
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