PORTER-CABLE PC18B-2 18-Volt NiCd Cordless Battery (2-Pack) High output nickel cadmium battery cells with -inchno memory-inch technology provide up to 500 recharges 1.5 Ah cells provide extended runtime on each charge 3-year limited warranty, 1-year free service contract, and 90-day money back guarantee Independently certified to meet applicable standards