HART 3-Pack 20-Volt Batteries, (2) 20-Volt 4ah Batteries and (1) 20-Volt 2ah Batter

On-Board Fuel Gauge Battery chart that is on the back of packaging Works with All HART 20V Tools Fade free Lithium-Ion power Includes: (2) 4.0Ah 20V Lithium-Ion Battery, (1) 2.0Ah 20V Lithium-Ion Battery Disclaimer: 4.0 Ah Batteries Compared to a 1.5Ah HART Lithium-Ion Battery tested on a HART Hammer Drill, 2.0 Ah Batteries Compared to a 1.5Ah HART Lithium-Ion Battery tested on a HART Hammer Drill Specs: Battery: 20V Lithium-Ion