XC70 power windows failure after battery replacement

Ugh, I feel your pain! Had almost the exact same thing happen after swapping the battery in my old Peugeot 307. Total nightmare. Did you try any kind of reset procedure? Maybe holding the window switch up for a few seconds after it's fully closed? Some cars need that after a power disconnect.

Yeah, I tried the usual hold-the-switch-up thing, but no luck. Held it for like 10 seconds, even longer. Still nothing. Is there a special sequence or something that I'm missing?

Okay, that's a bummer. On my Peugeot, nothing I tried worked. Turns out the regulator lost its mind and needed a proper re-initialization with the dealer's computer. Cost me a small fortune! In your case, you will need to go to the workshop.

Thanks for the advice! Took it to a shop, and you were right – window regulator initialization was the issue. Cost me 290€ to get it sorted. Appreciate the help!