Ok cool, but what’s the relevance?

Some batteries might be bad, so Apple gets to needlessly cripple your repaired phone’s performance, unless you go through Apple?

How could you possibly argue that’s not cunty behaviour?

If someone gets a repair with a non-OEM battery, and it turns out to be not good, then either let it shut down or throttle the performance as normal. If it turns out to be fine… don’t. The device is capable of doing battery checks.

I really don’t understand how you can defend Apple deliberately sabotaging performance over a part they know to be working fine.