Speaking of cordless drills, I have a couple Skill TopGun Pros (one for home
shop and one for boat) each has two 12 volt battery packs and charger..

I've found that the automatic battery charge doesn't like to operate off the
inverter for some reason. Gets very hot.. So I only recharge the batteries
when on shore power or gen. set..

Not a good arrangement in am emergency situation..

So, what I have done is convert one (opened and remove the cells) of the old
dead battery packs to 12 vdc cord and plug.. Now I can plug it directly into
the boat 12 volt system or use the one remaining good battery pack.. As much
as I like the portability of the rechargeable arrangement, I have found that
the drill has twice as much torgue when 12vdc cord powered..

Just something I thought I should pass on..

Steve
s/v Good Intentions