[rtkwe]

> Remember that old iPhones are frequently resold. You're going to want to know if it has OEM parts.

That's something they could display without disabling the entire battery monitoring screen though. They could do that for every single part of the phone but instead they remove functionality if you don't do things the apple approved way. If I open two identical iPhones and swap their batteries there shouldn't be any degradation in the phone but Apple has decided there should be and that I can't see the battery info any more under any circumstances unless I go through them.

[briandear]

How can they accurately monitor a non-Apple battery? Are they to test their systems against every possible junk battery?

For those complaining, you’ve never dealt with airplane repairs. If you want a draconian system, try using non-Garmin SD cards in Garmin avionics. A blank Garmin SD card costs $300 and your avionics won’t work without it.

[rtkwe]

The batteries have chips in them that do most of the reporting and for capacity Apple can monitor how much is being added during charge and use that to evaluate the capacity on an ongoing basis so there's no need to even trust the provided capacity 100%.

That's also a terrible system. The existence of a worse company doesn't excuse any company that does slightly better.

(At least with Garmin I could see a regulatory liability reason for it, Garmin's equipment is certified with a particular configuration so if we're being blindly legalistic it's not the same equipment with a different card. What's the card used for? To be clear I don't think they should be doing it the Garmin is just the GPS right? Every pilot should be 100% able to fly and navigate without it.)