Why Is my S8's battery draining much faster than it used to?

[Daniel Rogers4]

I've had my S8 for a little over a month and at first my battery life was amazing. It would last an entire day (about 20 hours on max charge with regular usage). Then about a week ago, I started getting **** poor battery life. Instead of lasting the usual 20, it's now starting to get low at 6 and a half hours, plus it has also been unusually hotter than normal (Same usage as before). I was unsure what is causing it so I decided to download two battery monitors (Gsam and Accubattery) and according to Accubattery my phone is discharging more battery with my screen off than when my screen is on, how does that work? Do I have a virus, or is there app running in the background I don't know about. I'll also be happy to provide pictures below of Gsam and Accubattery if that helps.

 

[Rukbat]

20 hours a day - so how far down were you draining the battery? 10%? Less? That can kill a battery in a month. Lithium batteries are not deep discharge batteries. Try to keep them between 40% and 80%. (Fully charging them shortens their lives too.) You might need a new battery - and with a sealed phone, it's no longer a $10 purchase.

 

[Daniel Rogers4]

I would drain it to around 30% before charging it

 

[ruben1975]

since oreo I have a big battery drain on my S8. cant seem to fix it nor finding usefull info on the internet. pissing me off because battery life was good