DEWALT 20V MAX Battery, Compact 1.5Ah (DCB201) Lightweight design Quick 30 minute charge time No memory and virtually no self-discharge for maximum productivity and less downtime *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18 Lightweight design for less use fatigue No memory and virtually no self-discharge for maximum productivity and less downtime Quick 30 minute charge time 3 year limited warranty