This starter kit includes one battery and charger. Our most powerful battery in its class, the 20V MAX DEWALT POWERSTACK 5.0Ah Battery utilizes revolutionary pouch cell technology to deliver 50% more power, 50% more work per charge, and 2X the lifespan. Compatible with all DEWALT 20V MAX tools and chargers, the DEWALT POWERSTACK 5.0 Ah Battery features an impact-resistant, rubber overmolded base and includes 3-LED Fuel Gauge state of charge indicator.