battery charging and battery level

[pheonix01]

Guys i have noticed some fluctuation in battery level on my SAMSUNG GALAXY M30s.

My phone shows 75 % charged in power off /switch off mode .. but soon i power on my phone and disconnects the charger it shows 79 % . 

There is always a difference of 3% to 5 % when switching from power off to power on..

HOW CAN I SOLVE THIS ISSUE .

i have done battery calibration. 

The battery drain in this device is so fast that it gets to 90 % from full charge within 20 min of doing offile and online work other than turning to mobile data ..

IS THIS BATTERY LEVEL ISSUE ..SAMSUNG MEAN BY THE PRODUCTION OF FREE ENERGY .?😂😂😂

[Anonymous · Accepted solution]

that is not any battery issue it's software issue bro

[pheonix01]

can i solve that in any way

[Anonymous]

when next security updates will come then flash it from service center or install it via smart switch and pc which is process and recommended.....if someone simply update software via mobile data or wifi then maximum time there will be the chance to produce software loop hole formation which can leads to create thousands of issue in devices by which this forum is full with because Samsung provides non A/B partition type ota software not like other company hence anything mysterious can happend with device

[Anonymous]

if you done calibration by charging method i.e discharge completely and charge 0-100% in switch mode with fast charge turned off and it didn't help then reset battery stats by dialing *#0228# it will reset the fuel gauge of battery and clears battery stats.

[pheonix01]

yaah bro i did it but no result

[Anonymous]

then do calibration by code

[pheonix01]

bro i did it *#0228#* is it

[pheonix01]

but no way

[Anonymous]

yes you have to do it after full charge. if you see battery decreased charge again to 100 and use code again decreased again charge again.. do this until after full charge + using code battery bar stays at 100%. then your battery is calibrated.