On macOS, I never worried about battery life when leaving the house even when doing compute-heavy work. On Asahi, that is equally much true. I couldn't tell you how many hours it lasts because I never have to carry a charger unless I'm out for more than a regular workday.
There's some room for improvement, but that is purely relative to macOS. Asahi still solidly beats other x86 devices (other than the low end ones you wouldn't do development work on).
One issue is that idle battery consumption is higher than on macOS (an active area of improvement though [1]), which you'll notice by an M1 laptop discharging by about 12% overnight when macos would've eaten maybe 2-3%. Not a big issue normally, but can be inconvenient if the device shuts down due to empty battery overnight.
During more passive uses at daytime (e.g. playing music), the display tends to be the biggest power hog. Not really Linux-specific, but I actively turn off the screen when not needed hence (KDE lets you configure the power button to do so).
There's some room for improvement, but that is purely relative to macOS. Asahi still solidly beats other x86 devices (other than the low end ones you wouldn't do development work on).
One issue is that idle battery consumption is higher than on macOS (an active area of improvement though [1]), which you'll notice by an M1 laptop discharging by about 12% overnight when macos would've eaten maybe 2-3%. Not a big issue normally, but can be inconvenient if the device shuts down due to empty battery overnight.
During more passive uses at daytime (e.g. playing music), the display tends to be the biggest power hog. Not really Linux-specific, but I actively turn off the screen when not needed hence (KDE lets you configure the power button to do so).
[1] https://social.treehouse.systems/@chaos_princess/11498433865...