2 Pack, 20V, 5.0Ah, Premium Max XR Lithium-Ion Battery Pack, Provides Up To 60% More Capacity Than Standard 20V Max Battery Pack, 3 LED Fuel Gauge Allows Immediate Feedback On State Of Charge, No Memory & Virtually No Self-Discharge For Maximum Productivity & Less Downtime, Lightweight At 1.4 LB Per Pack, 5.0A Hour Capacity, Features A Large Charging Capacity For Convenience, Compatible With All 20-V Max Tools.