I can tell you that I can run Linux at ~3.5 Watts/hour ("normal" workflow - chiefly on documents) on my laptop: you should check what is draining your battery,

I can tell you that I can run Linux at ~3.5 Watts/hour ("normal" workflow - chiefly on documents) on my laptop: you should check what is draining your battery, because the issue on efficiency you see is not necessary at all.