People here are suggesting limiting your battery charge as a proactive measure to prevent degradation but an M3 is far too new for you to be getting so poor battery life from use, even if you spent all day every day charging and discharging it.
The only plausible answers are either: something you’re running is eating CPU/GPU cycles like crazy (browser tabs gone amok, background processes) or you have a defective battery. Use Activity Monitor to look for energy usage and that will give you a pretty good idea.
The only plausible answers are either: something you’re running is eating CPU/GPU cycles like crazy (browser tabs gone amok, background processes) or you have a defective battery. Use Activity Monitor to look for energy usage and that will give you a pretty good idea.