My 16 Pro Max also has 100% maximum capacity and I use Magsafe every night and have since I got it shortly after release last year.My 16 Pro still has 100% maximum capacity as well. I don't use Magsafe, most of the time I just charge overnight with a 5w old Apple brick when I'm at home. The other times I will charge while at work and I use an old ipad 12w charger.