The PORTER CABLE PCC681L4 20V 1.3 AH Lithium Battery, 4 pack delivers more power and runtime in a smaller package. This battery has an extended run time, and spends less time on the charger. Compatible with all of the Porter Cable 20-volt lithium-ion cordless tools. Works with Battery Chargers: PCC692L, PCC691L, PCC690L (sold separately). Backed by a PORTER CABLE 2 year limited warranty. Includes: (4) 20V Lithium Ion Batteries. Backed by a Porter Cable 3 Year Limited Warranty and a 90 Day Money Back Guarantee. High-energy flow cells improve tool performance, ensuring optimum results. No memory loss and minimal self-discharge means the battery is ready when needed. Compatible with all of the Porter Cable 20-volt Lithium-Ion cordless tools. Powers all Porter Cable 20-volt max power tools for your convenience. Works with Battery Chargers: PCC692L, PCC691L, PCC690L (sold separately).