A3 2016 draining battery

Hello Everyone

A Samsung A3 2016 Model:SM-A310F is draining battery very fast and when im putting it on charge its not taking charge or not even switching on i have to remove the battery and then the phone switched on.the android version on the phone is 7.1

what can cause this problem?

is it the power ic or the power amplifier?

can someone to be helped Along with it?