install accubattery app. it will tell you the estimated capacity of your battery. please note that it will take 1 week or few charge cycles to estimate the actual capacity
"accubattery app" is a just a gimmick. Dont believe in it.. I checked its accuracy multiple times..it tells wrong informations. battery health should not be a matter.. Actual thing is "battery cycle" which matters a lot.. A battery after 500 cycles is need to be replaced with a new one.
