Someone in the armor ideas thread suggested "Static Boots" that charge up your Batpack as you walk. Sounds like it would be similar to this mod and equally useful - especially for those of us cave dwellers who seldom see the sun!
Think you can do it, RichardG?
I like this idea... Piezoelectric boots that generate like 1EU per step, but make you use food at a slightly higher rate (maybe +10-15%).
Not part of the quantum suit, though... I think by that point your tools should just use the q-armor's energy storage as a batpack, which is plenty of energy to not have to worry too much about it.