My samsung note 9 is auto-switching off and the left back cover is hot. Everytime I switch on the phone,it remains in "ON" mode for a few minutes before switching off automatically. The left side back cover is hot whenever this happens.Could it be due to the battery issue?
Given that the phone is quite old (2018 model), highly likely the battery is the main cause. Batteries in cellphones have an average lifespan of 2-3 years, recommend to either replace the battery soonest possible or consider getting a new device.
Battery problems can cause more than just shutdowns, it could potentially bloat and damage other hardware in the phone. Besides that, risks of leakages and even fires might happen if subjected to high external stress/pressure.
