Tried old mikwaukee a couple times when I was younger but it was nasty.

What do people do with their old stuff? The last combo kit I bought was the neon green Ryobis when the lithium batteries had just come out. Great tools, but after 4 or 5 years the batteries wouldn't hold a charge more than a few minutes of work. A couple of new batteries were more than buying the new combo set that I bought. Does that make since? Anyway, I've got a perfectly good drill, skillsaw and sawzall with no batteries. Kinda seems wasteful to toss them in the trash.