I updated my Galaxy S21 to the latest Android version last week, and since then, my battery life has tanked. It used to last me all day easily, but now by mid-afternoon, I’m scrambling for a charger. I’ve tried restarting, closing background apps, and even resetting some settings, but nothing really helped.

Has anyone else experienced this after the update? Did you find any tweaks or apps that helped improve battery life again? I’m considering a factory reset but want to hear if there are less drastic fixes first.

Appreciate any advice or stories from your own battery struggles!

On 01/19/2026 at 5:30 PM, TechWhiz42 said:

I updated my Galaxy S21 to the latest Android version last week, and since then, my battery life has tanked. It used to last me all day easily, but now by mid-afternoon, I’m scrambling for a charger. I’ve tried restarting, closing background apps, and even resetting some settings, but nothing really helped.

Has anyone else experienced this after the update? Did you find any tweaks or apps that helped improve battery life again? I’m considering a factory reset but want to hear if there are less drastic fixes first.

Appreciate any advice or stories from your own battery struggles!

@TechWhiz42, I had a similar issue after a recent update on my S21. One thing that helped me was diving into the battery usage stats to see if any app suddenly started draining more power than usual. Sometimes, after updates, some apps misbehave and run in the background way more than they should. If you spot a culprit, force stop or uninstall it temporarily to test.

Also, toggling off features like Always-On Display or reducing screen brightness can make a noticeable difference. If you haven’t already, try booting into safe mode to see if the battery drain persists - this can help rule out third-party apps. Factory reset is a solid last resort, but these steps might save you the hassle.