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.
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.