This 20V MAX* 2 Ah lithium-ion battery is the ultimate solution for a high performance cordless platform. It features 33% more runtime than standard 1.5 Ah batteries. This battery features no memory and minimal self-discharge so it is ready when you are. Porter-Cable® 20V MAX* MATRIX™ Cordless Tool Battery, Bare Tool, Lithium-Ion Battery, 2 Ah Battery, 20 VDC Charge, For Use With: All Porter-Cable® 20 V MAX* Power Tools