I think they should develop a battery powered tool, say a drill, and build the charger right in the handle. All you have to do is run a cord and plug it in and it will charge whilst (drat, that word again) using the tool. The cord wouldn't be too much of a problem, I don't think. After use, you could wrap it conveniently around the tool before storing it in its case. You'd never have to worry about running out of battery power, because it would always be plugged in.
r . . . . . . . . . . . . . . . . . . .
*donning Nomex underwear*