I haven't changed my iPhone 13 battery and I keep getting the 'non-genuine' battery message
I haven't changed my 1.5 year old iPhone 13 battery ever and I keep getting the 'non-genuine' battery message. The iOS is updated. Not able to install 16.4.1. I went to the Apple Store Genius Bar yesterday. The technician said my battery had 89% life on it and he didn't believe me when I said I've never changed my battery, nor have I needed to. Is this a glitch with apple updates or a real concern?
iPhone 13