Hello, I just ordered a Ridgid r854 sawzall on ebay. The guy says it works with 18 v ni cads, which is what I use but when I looked up the saw, it says its a 24v lithium. So I called Ridgid and the guy I spoke to said it wont work with 18v but he seemed like he didnt know what he was talking about. Does any one know for sure? Thanks in advance all.