After suffering an injury that allows me only partial use of my left arm, I investigated replacing the winches on our boat with electrics. Before doing so, however, we attended a boat show
where a device consisting of a cordless Milwaukee Right Angle drill fitted with a "winch bitt" and a very nicely made cover was offered. It turns out that on the internet
the drill was all of $350 while the winch bitt was $19--all up about 1/3rd of the boat show
offering (but we didn't get a nice cover--we made one). With this device even my 105# wife easily hoists the main and trims and furls a 135 headsail on our First 42. As SeaKing noted, the batteries charge quickly, even with a 12 volt charger
. (The batteries seem to last best if stored in the fridge fully charged in a zip-lock bag.) Lastly of course is the fact that the drill has other uses when simply used as a drill.