[mikepurvis]

There's an argument here that the customer could end up the victim if they pay for a genuine part and end up with a knockoff. However, that should be something resolvable after-the-fact— if a device shows up at a Genius Bar with a counterfeit battery, ask the user where it came from, engage lawyers.

[sushicat]

I remember when iOS started showing alert for non-genius battery for a while, some people hate it.

[mikepurvis]

Looks like this started in 2019, so I guess it only affects more recent hardware? I put an iFixit battery in my 5S a year ago and I didn't hear any complaints (doubled the life of it compared to the tired old one in there, too).