Just discovered this:
Since Apple may soon block independent repairs and/or obsolete my MacBook Air I know where my next laptop is going to come from... 🤓
If the cpu is always draining 4.5w, then it would only last 9 hours. Assuming the cpu is the only thing drawing power.
But, with power saving states, it will be able to draw much less power. So, unless you are running the laptop at full tilt with jobs or using a heavy desktop environment, 24 hours could be possible.
Wifi and Bluetooth are relatively low power, especially compared to a modern CPU running on all cores at full blast. SSD are also low power, as far as I know, especially compared to HDD.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko