My intel 16” base model gets 0.6 FPS in handbrake so yeah...Yesterday evening battery was at 10% I loaded it up to 80% used it some hours after that, I didn't do anything wild. Mostly browsing. I did a short test using Handbrake (1.4 beta native), trying to convert a h.264 video to h.265 but that was at 10fps, so I stopped it after a few minutes. After reading so much about how powerful the m1 is I expected more from that.
Now the battery is at 40%, after around 13 hours of usage according to the battery settings.