DEWALT DCB204-2 20V Max Premium XR Li-Ion Battery, 2-Pack Premium Xr Li-ion Pack Provides Up To 33% Longer Run Time Than Standard 20v Max Battery Packs 3-led Fuel Gauge System Allows Immediate Feedback On State Of Charge No Memory & Virtually No Self-discharge For Maximum Productivity & Less Downtime Premium XR Lithium Ion pack provides up to 33% longer run-time 3-LED Fuel Gauge System Lightweight design with maximum run time Compatible with the entire Line of DEWALT 20V MAX Tools *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18 Premium XR Lithium Ion pack provides up to 33% longer run-time 3-LED Fuel Gauge System Lightweight design with maximum run time Compatible with the entire Line of DEWALT 20V MAX Tools