My first gen SE battery began dropping like a stone after the 14.3 iOS update. I am an older user and I do not use many apps at all. I would go out with the phone at 100% and two hours later it would be down in the weeds (< 20%). After a complete backup/reset/restore I managed to get it somewhat back under control, and I turned off automatic sw updates. Then I forgot about the iOS issue (I'm getting older - give me a break); got annoyed at always seeing the red "1" on my Settings icon; and "accidentally" updated to 14.4 last week. Then I found and read through this forum. I live too far from an Apple store, so I made an appointment at my local Best Buy through the Apple support website. Showed up at Best Buy yesterday. "Oh, we don't support that older model anymore. Apple doesn't even give us the tools/training to work on it anymore. We've tried notifying Apple several times because people with older phones keep coming in with Apple appointments. It's how they get you to buy a new phone." Best Buy referred me to a local cell phone repair shop. They replaced the battery for $70 at Noon PST 3/6/21. Phone changed from 83% battery health to 100%; showed it had a 71% charge; and hasn't budged from that since then. It feels like a brand new phone, and I'm a happy camper.
