Battery Voltage lower than expected

[Fast_Lessy]

The Battery life of my Galaxy S10 SM-G973U isn't really as good as I expected it to be. I bought it as a refurbished phone approximately 9 Months ago. When I fully charge the phone and then watch the battery voltage in for example Accubattery, it says 4.270V. However the charge voltage of the Battery is 4.35V. When I do the same on the Galaxy s7 the with the factory original battery, it says 4.35V. I once read that samsung does that in order to protect the battery when it gets older. But if that was the case, a battery replacement would be useless as the new battery would never get charged to 4.35V. Does everybody know if this is really the case and if there is a fix for this Limitation? Thanks in advance.
Fast_Lessy

 

[blackhawk]

I wouldn't worry about it. Monitor your SOT times. A heavily used (or abused) battery may need replaced every year. Just part of regular maintenance. When it gets to 80% of it original capacity replace it to prevent a failure.
Any swelling is a failure, replace immediately.

100% charges aren't desirable anyway...

 

[Fast_Lessy]

Well my SOTs are around 3.5hours on a normal studying day and about 5h at the weekend with a lot of Youtube watching. They aren't bad but I see people with 5hours+ on normal usage and 8 hours with watching youtube. I just like to optimize and cant really reach the good SOTs.

 

[blackhawk]

Well my SOTs are around 3.5hours on a normal studying day and about 5h at the weekend with a lot of Youtube watching. They aren't bad but I see people with 5hours+ on normal usage and 8 hours with watching youtube. I just like to optimize and cant really reach the good SOTs.

I'd expect better SOT if optimized. Constant high current drain is harder on the battery as well as inconvenient.
For starters ditch trash apps like all social media apps, none should be installed. They are security risks and battery hogs.
Use manual brightness control and stay under 50%.

 

[frogale]

It seems you are having the same problem I had when I replaced the battery on my Galaxy S10+. AccuBattery tells me I only have 75% battery left. So I bought a new battery, replaced it. And the capacity was exactly the same. The battery was only charged to 4.18V max.

This is my solution:
- Back up your device with Samsung's "Smart Switch" Windows app
- Root your phone with these tutorials:

- Install Ghost commander, enable root access in it
- Go to /efs/FactoryApp/ and copy the batt_discharge_level file to your storage
- Edit the file and put the number 100 there (that means 1 battery cycle, you can change it to a bigger number if you have older battery)
- Copy the file back to /efs/FactoryApp/ replacing original one
- Change the owner of this file back to "system" and the group "log"
- Dial code *#9900# and reset the battery information there
- Reboot the phone (it should now charge at 4.35V)
- Unroot device by flashing original AP file, relock bootloader, disable OEM unlock
- Restore data with Smart Switch

 

[blackhawk]

It seems you are having the same problem I had when I replaced the battery on my Galaxy S10+. AccuBattery tells me I only have 75% battery left. So I bought a new battery, replaced it. And the capacity was exactly the same. The battery was only charged to 4.18V max.

This is my solution:
- Back up your device with Samsung's "Smart Switch" Windows app
- Root your phone with these tutorials:

- Install Ghost commander, enable root access in it
- Go to /efs/FactoryApp/ and copy the batt_discharge_level file to your storage
- Edit the file and put the number 100 there (that means 1 battery cycle, you can change it to a bigger number if you have older battery)
- Copy the file back to /efs/FactoryApp/ replacing original one
- Change the owner of this file back to "system" and the group "log"
- Dial code *#9900# and reset the battery information there
- Reboot the phone (it should now charge at 4.35V)
- Unroot device by flashing original AP file, relock bootloader, disable OEM unlock
- Restore data with Smart Switch

Not worth all that trouble; under charging the battery will only increase its lifespan.
After replacement cycle 3 times from 100 to 20% to calibrate.
Never depend on SmartSwitch to backup critical data as it can fail you miserably. Always copy/paste critical files/folders instead.

 

[frogale]

Cycling from 100 to 20 will not help. Max charging voltage will be lower than 4.35V. Rooting is needed.

 

[blackhawk]

Cycling from 100 to 20 will not help. Max charging voltage will be lower than 4.35V. Rooting is needed.

I try a forced reboot, clear system cache and there may be other options in hidden settings ie abd edits.

Rooting is overkill unless you want to root it to begin with. Win-win if so...

 

[Fast_Lessy]

Thanks for your answers. The Problem is I don't want to root my device or play around with the Firmware because it's my main device. I was hoping that there's a way to reset the cycles without the need to root or reset the device. If that's not the case, I won't change anything to be on the safe side.
But I apprechiate you guys for the help and answers.