I've worked in laptop repair for various brands before (Acer, Dell, Compaq). Whenever people ask my advice I always recommend they buy a laptop extended warranty, and I buy it myself. It usually pays for itself on the first service call.

That said, a thousand Euros to replace a battery is ludicrous. No consumer should be charged that, warranty or no.

For reference, I recently got a second hand recent ThinkPad with a dud battery and bought the genuine replacement battery for AU$200 (€123) and could replace it myself as it's an FRU.

Apple should not be charging literally an entire order of magnitude more for the same part, regardless of the service cost.

It doesn't solve the problem when it happens 3y+1d.