Shorter battery with recent R 20230112?

Hi, I have /e/OS “R” on my SM-G900. From december update I have problems with display rotation, it does not work, and with january update to 20230112 I’m experiencing half of the battery life. Battery handled 2 days with light web usage and about 2 hours of display on, but now it lasts only one day. It could be coincidence, I have quite new (original samsung) battery whis is now 3 months old, maybe it is starting to degrade, maybe it’s faulty, but I’m asking here, if someone is experiencing the same issue? Maybe it’s because the phone is upgrading itself and I should time to time backup and flash new version directly? Thanks.