Sudden drop in battery after 15% in S8

[ShoCkWaVe]

Hi guys, I have an s8 which is roughly 13 months old. I have installed the November security patch.i was using the phone and the battery drop to 15 then suddenly, in less than a minute, the battery dropped rapidly to 4 %. 😟😟. Have you guys experience this issue and of so what must I do to fix it? 

Rest of the phone is awesome👌🏽👌🏽👌🏽 ...I have nothing else to complain. 

Cheers

[JUMMAN1987BANGLADESH]

my sensor not working after the update

[ShoCkWaVe]

ohhh i dont have anu idea aboutthe sensor but have u faced this battery problem

[sauravvishwakarma030]

use the code *#0228# then press calibrate and wait for 10 second your screen will turn off and automatic on then it will show the correct battery level

[sawan07]

I am having a S9+. Same issue with me. Can't understand what is going on

[kpu]

same here bro