The 3/8 and 1/2 inch use different batteries 12 and 18 volt. I have to 5.0 for the half and a 3 and a a 6.0 for the 12 volt. I use a 3/8 stubby gun and ratchet as well as the 1/2 Love em. I waited years before switching to battery tools. In retrospect I would ... Login to read more.