s8 battery backup is very poor... not like a flagship martphones...

when update in oreo, mobile heating and laging a lot plus battery also draining fast.. plz fix it..

hi every one ! my s8 battery drain 100 to 0 in just 4 to 5 hour. i use only net browsing on LTE and wifi both.no camera no flash light no any games only just browsing..so any freind tell me it's a normal or it's a battery issue...? when i complaint i...