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I have an iPhone 7 A1660 for just over 2 years. It’s out of warranty so when it lost service last year it went into the drawer and I got a new 8. I have since worked out it is eligible for Apples Repair Programme for the known issue on the A1660 model. My question is, when the device was out of warranty last year I got a battery replacement with a local repair store. Do 3rd party parts such as a battery effect a device on a repair Programme of a known recognised fault with Apple?
The battery didn’t cause the issue but sometimes the “geniuses” can be jerks and say it’s not covered due to that. I’ve had people go in and have replacement handsets in minutes even with cracked screens and then I’ve had others be randomly fobbed off all depends on the genius :) You may want to charge the phone though as a replacement battery or even a genuine one sitting in a drawer for a while may not charge…