the actual drill is wired to the battery, you need a good make 18v drill, i have used cheaper ones but the motors start to smoke, take the batterys out if the battery pack, then solder wires onto the positive and negative wires in the battery pack then connect it up to the battery in the van, load of power and it never runs out. I would recommend a drill with 2 speeds and select the slower speed, and a drill with a variable speed trigger then you have more control over it.