Samsung A20 Battery drainage

[SunnyCMA]

My A20's battery fall from 35% to 0%in just under a minute. Any suggestions?  Should i be really taking it to customer care centre for check up? Its been a year. I know battery depreciates over time but its shockingly so quick 

[doctorHimself]

accubattery is quite good. I guess most of the features are premium but free version would work. Or you can search for a mod on internet.

[SunnyCMA]

thanks for the assist