First step install this gem of an App! [https://www.coconut-flavour.com/coconutbattery/|CoconutBattey] let’s get a snapshot of the apps main window posting it here so we can see.
Then let’s give this a try! Disconnect the charger and any other connections, carefully disconnect the battery with it disconnected press and hold the power button for a good 15 secs to fully discharge the logic board which will also do a hard reset of SMC.
Then you need to reconnect the charger which should spontaneously restart your system, let the system fully bootup and the do a clean shutdown. Now reconnect the battery and restart your system.