Obviously it's one of those “light alloy” battery packs…
Well, I've answered the owner of the mini-drill if the thing could actually drill at all… LOL!
I am thinking in a 4S li-ion pack. What should I stick inside? VTC5s? VTC4s? HE4s? That should give the tool enough oomph for it to do actual work, doesn't it?
Copper is mine, copper divine!
«You may be taught and think for shame to be good but, in fact, a wise master said to me you wouldn't enter the heavens alive before going through your last bit of it.»