DEWALT DCB200 3.0 Ah 20V Li-Ion Premium Battery 3.0 Ah extended run-time battery provides long run-time and battery life No memory and virtually no self-discharge for maximum productivity and less downtime Weighs 1.6 pounds, allowing user maximum run time and a light weight battery In easy-to-open bulk packaging to pass the savings on to you *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18