I have a B+D cordless with a few batts. It works well. I usually ride to the spots that need work with it in a backpack but it wears me out pretty fast. I'm thinking of a rack to hold it.
I was just over at Nehantic S.F. there's a bunch of big limbs on one trail, perfect for a cordless, no noise at all. Mine was $90 I think, it's been a few years at least. Extra batts. $40 each. Also bought a better charger $30