I was at 93% with not many cycles having bought mine in November. My local Apple Store in Surrey, England replaced the battery because they thought it was odd. I turned up the next day to collect it and they hadn’t actually told me transparently that they had replaced the screen as well because the battery replacement had gone wrong in some way. I just saw this repair on an email setting out the repair which I only looked at later that day as I assumed it would just mention the battery repair. Nice of them not to tell me as my previous screen had a Belkin screen protector on, fitted for £30 at the same Apple store, and they didn’t bother to replace it. Classy company. I phoned up to complain, they said I could come back in and have it fitted but it would cost more in effort and petrol so I’ll get one from Amazon. I said they should’ve mentioned it when I picked it up that morning. I didn’t think to examine the screen that closely because I wasn’t aware that anything had been done. £1000 device, might be my last.