John had some of these battery savers he talks about already on his phone, but the one he didn't was the switch to LTE instead of using 4G or 5G. It starts at 3:40 into this video which is where this video starts - I would listen thru to 6:00 into the call if you don't want to do them all - I didn't want 5G anyway and many do not even have it yet so it is looking for 5G I suppose which drains the battery alot. It made all the difference in the battery for both of us (hours). You may want to give it a try.
5:33 Wi-Fi over Cellular thru 6:09