I'm guessing Apple really doesn't want third-party battery packs, because being able to reliably warn about low battery is an actual safety issue in a headset.
At least it's not hard wired like their awful pre-USB-C laptop power bricks where the cable would yellow and fray after a couple years of gentle use.
It’s a fat lighting cable, why would Apple do this?
wow this specific single use cable with two proprietary ends looks superficially like a lightning cable. apple is so evil!
are people just pretending to be outraged now?
Lightning seems to be a kind of drug for Apple that they can't get rid of even if threatened with punishment.