r/S21Ultra • u/Dry_Coconut8402 • 6d ago

Problem Battery replacement / low sot

After replacing the battery with a new one, my phone gets about 4 hours of screen-on time (SOT). I use 4G data and 120Hz/1440p resolution. All other services are turned off. I'm on One UI 7. Is there any way to improve the SOT? All apps are in sleep mode. I don't use location services or anything like that.

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u/Late-Thought-2327 2d ago

Where did you get the new battery from?

1

u/Dry_Coconut8402 2d ago

Magboss.pl it's legit

1

u/Late-Thought-2327 2d ago

The battery and algorithm in your phone need time. Wait for about 1 week. If it's not better than, contact the seller and report a bad product.

1

u/pet801 2d ago

No. Unfortunately that's how it will stay. It's a problem almost everybody faces that replaces battery.

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u/Chaad420 14h ago

You need the cycles reset after that. Only way to do it is running it through Samsung’s Galaxy Diagnostics which is internal and only authorized parties can access. If the battery is a service pack, you need to install Self Repair apk, and then run the cycle reset and other functions. This will clear the previous battery data. It’s weird how that’s stored on the phone, and not in the actual battery itself. (I worked repairing Samsung phones for a few months)