I go with the nicad vs lion talk. I was given one of those Home Depot Ryobi tool sets almost 10 years ago.the original nicads acted just like Denny's HF stuff is described. When Ryobi went LiOn, they made sure the new batts fit the old tools. LiOns go forever, they don't slow down in use, they just suddenly stop working at "charge me" time.
Any one who can buy Fein tools must be a pro. I can't afford to even look at them. Their skilsaw with the built in guide and vacuum is a beaut.
