How to fix Galaxy S9 battery drain issue: discharges fast when it reaches 30%

[MrFak]

Hello My Samsung S9 is having battery issues. Sometimes i get to 30% battery and dont touch phone for 5 minutes to only discover phone battery has completely discharged and have to charge phone. This happens at different percentage of battery but all under 30%. When it does get to show battery needs charging at 15% warning, i put phone on charger only to watch it the phone discharge to 0% turn off and start charging. I do use the device manager to check battery and am now wondering if that has some effect on what is going on. Look forward to your suggestions. Thank you.

[MrFak]

check out the background usage

[AliRazaShafi]

i have almost same background usage of "facebook services" and "push services" apps. but battery usage is different.
and i use QHD resolution with AOD and edge lightning everything on.

[AliRazaShafi]

i had the same problem with Google Play services. resetting fixed my issue.

[MrFak]

resetting?

[MrFak]

how to reset can u plz share the process?

[AliRazaShafi]

Settings -> About -> Reset.
kindly backup your data before resetting.

[MrFak]

oh that one

[shabishah1]

you can try calibrating your battery. i was having the same issue but it was sorted once i successfully calibrated my battery.

[MahinaLashari]

how do you calibrate your battery? this seems interesting, can you please elaborate?

[shabishah1]

calibration helped me with my issue, you can type *#0228*# in your dial pad, or you can look up google to see what you can do. after resetting the info from the above mentioned menu, you jave to let your phone charge completely and don't use it while it's charging and use it till discharges completely. Repeat this for 3 or 4 times. you should be good to go. it does help to improve the battery life to as it rules out issues relating to battery. my s9 would drain in secs one below 15% but it's all good now.