So I have a relatively new iPhone 12. Never had a problem with it. Battery would last quite a while before needing any kind of charge..........UNTIL they sent out a new IOS upgrade. So I downloaded the 16.5 "Fix" that they sent out. Booooooooooo
My battery would not last the night. It would be at 100% when I went to bed and would be at 3% or less in the morning. I would check the battery to see what offending programs was my battery. I couldn't see much that was causing this to happen. Not only was I having problems with the battery but the phone was laggy like you wouldn't believe. I would touch an icon or try to do something and the lag was just incredible.
Next step, Google the problem. Many said they were having problems with 16.5. The fixes that were being recommended were nothing that I hadn't already done. Shut the phone down. Wait for the program to learn your phone. Bla bla bla bla.
Then 16.5.1 came along and I had hopes that they were going to fix the fix that was supposed to have fixed something else. NOPE, it was just as bad if not worse. It almost seemed that while I was actually using the phone the battery would last longer.
I had finally had it. I set up an appointment at the Apple store to get to the bottom of it. After setting up the appointment I was sent an email of things they wanted me to do prior to the appointment. I did them. Backed up the phone to the cloud. I ran a diagnostic program that they had. Last was check for any new downloads. So I did that. Low and behold there was 16.6.
Not being too hopeful I did as was instructed. 16.6 was downloaded. I went to sleep and woke up to a phone that was still almost fully charged. Not only that, the phone had no lag problems.
This concerns me that Apple can make your phone preform so poorly that you think you need a new battery. How many iPhone repair places have sold new batteries to unsuspecting customers only to have Apple fix the issues. To me, this is a huge issue.
My battery would not last the night. It would be at 100% when I went to bed and would be at 3% or less in the morning. I would check the battery to see what offending programs was my battery. I couldn't see much that was causing this to happen. Not only was I having problems with the battery but the phone was laggy like you wouldn't believe. I would touch an icon or try to do something and the lag was just incredible.
Next step, Google the problem. Many said they were having problems with 16.5. The fixes that were being recommended were nothing that I hadn't already done. Shut the phone down. Wait for the program to learn your phone. Bla bla bla bla.
Then 16.5.1 came along and I had hopes that they were going to fix the fix that was supposed to have fixed something else. NOPE, it was just as bad if not worse. It almost seemed that while I was actually using the phone the battery would last longer.
I had finally had it. I set up an appointment at the Apple store to get to the bottom of it. After setting up the appointment I was sent an email of things they wanted me to do prior to the appointment. I did them. Backed up the phone to the cloud. I ran a diagnostic program that they had. Last was check for any new downloads. So I did that. Low and behold there was 16.6.
Not being too hopeful I did as was instructed. 16.6 was downloaded. I went to sleep and woke up to a phone that was still almost fully charged. Not only that, the phone had no lag problems.
This concerns me that Apple can make your phone preform so poorly that you think you need a new battery. How many iPhone repair places have sold new batteries to unsuspecting customers only to have Apple fix the issues. To me, this is a huge issue.
But, I had been able to continue using it until last week. Then kinda like IAM Rand, I would go to bed with my phone on the charger, take it off the charger when I woke up, it would be 100%, but would turn off with no battery strength before I could even read 3-4 emails. 
I’d rather spend my very limited money on gun stuff than cellphones, so I’ll make do with the SE. It has a bionic chip, whatever that is, and is 5G capable. Will see……
