[sokoloff]

> changing your own battery will void the warranty

Not in the US it won’t.

See Magnusson Moss:

2302.c here: https://uscode.house.gov/view.xhtml?req=granuleid%3AUSC-prel...

[sidewndr46]

This always gets trotted out like some sort of 'gotcha bitch!' card you can just drop on a company. Then they just roll over and do whatever you want.

You'd have to be a lawyer to make that act work for you.

[sokoloff]

Automakers absolutely know this law and my experiences with warranty coverage (as an exclusive DIYer for literally everything except warranty work, tires, and paint) is that they readily and voluntarily follow it.