Was talking to my dad the other day about what he wanted for Christmas. I knew he had been looking at a new drill/driver set since he has the old original Ryobi stuff and he can't find batteries for them anymore. He keep buying cheap, off brand Chinese batteries for them that last a few months and then need replaced. I wanted to get him a Milwaukee or DeWalt set but he has so many Ryobi tools, replacing them all with new stuff would cost $1200+ and he doesnt want to invest that much in tools he'll use once a month at best. So I did some digging. Looks like the new Ryobi ONE+ Li-Ion batteries are backward compatible with the old blue Ryobi tools since they kept the "stem" design instead of going to slide-in batteries. So I bought him a kit with two 3.0Ah batteries and a charger. Now, as his old tools need replaced, he can replace them with new Ryobi stuff and keep the same batteries. I know it's not Milwaukee, DeWalt or one of the other big names, but his Ryobi stuff now is 15 years old and still kicking. At least this way, he can only replace the tools he uses the most with newer stuff and keep his old stuff for the once a year type jobs that arent worth spending a couple hundred bucks on new tools.