The DEWALT POWERSTACK 5.0 Ah 20V MAX battery is 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. This starter kit includes One (1) 20V MAX PowerStack Lithium-Ion Compact Battery 5.0 Ah (DCBP520) and One (1) 12V/20V Max Litium-Ion Battery Charger.