Amazon.com Product Description: Keep your DEWALT 18-volt cordless tools powered with the DC9096 XRP extended run time batteries. DEWALT uses top-quality NiCd cells, offering a consistent and adaptable performance. The extended run time batteries deliver 40 percent more run time with new cobalt technology.
It is a NiCad, but you probably don't remember how well it USED to hold a charge if you have suffered with the original batteries as long as I did (8 years). It is a breath of fresh air to have sustained power again!