@korenchkin@chaos.social I did buy a laptop somewhat recently-ish (couple years ago) with almost the full 100Wh battery capacity; it was a new x270 with internal battery and the extended external battery option. So dual-battery (hotswappable) and it totalled up to something like 96Wh.

I did get that laptop specifically for its absurd power efficiency; I can easily use it a whole day at a conference without charging even once.