This thread has been a real eye opener for me. Helped me come to a decision.
I have been adding to my cordless tool collection also wanting to have a station to store and charge. I have some 18V Dewalt, smaller 12V Dewalt and Porter Cable tools and now that I need new batteries have been looking at the 20V Max adapter ($120 two batteries and charger) so as not to continue with 18V.
Looking at the price of batteries as well as the time I spend jacking with keeping all charged and safe, I have come to the startling conclusion that for me and how I use power tools, mostly inside my garage or immediatly outside, cordless is unnecessary. If I were a contractor working remote sites it would be different. I have outlets everywhere, many heavy extension cords, and can buy a corded tool for what two replacement batteries cost.
I used to operate around my home with corded tools and a very small Black and Decker recharable driver. Now I am cordless tool rich, but am battery, charger, recycle, and safety poor. In the future I'm buying corded tools.
Cheers,
Selo