S25+ Battery Issue

[Bruce_205]

I got my S25+ in September, coming from an S23, and I noticed right away how awesome the battery was. I use it for gig work and it would stay over 90% for a LONG time! But suddenly last month it drains much faster. I cannot go a full day now. I need to carry a charge pack just in case. Today, I started at 100 and now I'm at 12%. Screen on time was less than 5 hours of the past 12.

I decided to try and do a warranty claim so I took it to one of Samsung's repair places. they said they'd do a full diagnostic. The result was that my battery health shows as Excellent, it can charge up to the rated capacity (4800 mah), and it only shows 151 cycles. I disagree with that, because I've had the phone more than 180 days and I charge it every night in addition to sometimes needing to plug it in during the day. He said that Samsung won't warranty it with this result and he discouraged me from paying for it because they believe my battery is good. But I am certain that it drains much faster. I did a factory reset, deleted a few apps, put others to sleep, I have the screen on adaptive brightness..I don't know what else to do! The battery does not last as long as it did when new, but I don't want to gamble with spending the money on a new battery if it is going to be the same.

 

[olbriar]

Sudden change in battery life is often due to a rogue app that's running in background. Consider what you might have installed prior to the change in battery behavior and uninstall or reinstall the app. With the battery testing showing excellent, a bad app is my best guess of the culprit. If you factory reset the phone again, do a methodical reinstall of your apps. Checking battery drain after reintroducing an app or a small group of apps. It doesn't sound like hardware and isn't likely an OS problem.
Good luck and I'm sorry you are having problems.