Warnings Apply to Legit iPhone Batteries, Too
Yup, this isn’t just about third-party and knockoff batteries. If you take a totally authentic battery, professionally installed on one iPhone, and put it in another iPhone of the same model, Apple’s countermeasures will still kick in.
That’s a significant blow to anyone who may be selling “refurbished” iPhone batteries or similar products. Again, Apple wants to make entirely sure that its battery readings are accurate, and that nobody has tampered with the battery.
Switching out a used iPhone battery, even if it’s precisely the right kind, still won’t guarantee it’ll work as expected.