> * If a new machine is genuinely more efficient (and we keep being > told that they are!),
The capacity of laptop batteries has been stable around 50-100Wh for
decades, so the detailed and concrete data about potential improvement
in efficiency is readily available in the form measurement of how long
each laptop can be used on a single charge.
Improvements over time have been real, but not super fast.
I'd say it's about doubled every 8-10 years?
Stefan
