I have the Craftsman 75th Anniversary tools set I bought back somewhere around 2000- 2003. I more of a weekend warrior, well I know what I am doing, but just don't have the time. Anyways the 19.2 batteries no longer hold a charge and not sure what to do. It will cost about $70 to get two new batteries, but after reading the review for the Milwaukee V28 on the home page, I can get a new kit for around $600. Am I better off just keeping the kit I have or should I upgrade to the Milwaukee V28?