DEWALT DCF620M2 4.0AH 20-volt MAX XR Li-Ion Brushless Drywall ScrewGun DEWALT brushless motor in that delivers superior performance and maximum run time Li-Ion battery with fuel gauge provide 33-Percent more capacity over standard packs Cone-Lock(tm) nosecone locks on securely and is easily removed ergonomically designed for less worker fatigue LED light for visibility in tight spaces *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18