Battery charging too fast?

My phone is reporting incorrect estimates for full charge. Should I calibrate it by charging to 100 then draining and charging back to 100?

Also anyone know why this occurs? This happened with my previous phone as well (Oneplus 8) but it had a custom rom so I didn't think much of it. Could there be something wrong with the sockets at my house? I'm using the default samsung brick and wire connected to a daisy chained extension.