You can do much better than the prices HD charges for Dewalt. Just yesterday I purchased 2 18volt Dewalt 9096 batteries for $40ea at the dewalt service center in Atlanta (We needed a new chuck). I buy the 18 Dewalt set DW4k-2 on ebay usually for about $365 including shipping on ebay, this is $499+tax at HD. I've considered trying Bosch or Milwaukee, but we have so much 18volt Dewalt stuff, that it would be hard to start mixing it in since all our stuff works on the same battery now.