DEWALT® exclusive NANO™-phosphate lithium ion cells offer long battery life and durability: 2,000 recharges Lightweight design- 1.5 lbs; same weight as an 12V NiCd battery No memory and virtually no self-discharge for maximum productivity and less downtime Requires XRP Li-Ion compatible charger (DC9310, DC9320 or DC9319) Voltage 18 V Features High performance battery pack Compatible with Entire line of DEWALT® 18 Volt tools Shipping Weight 1.7 lbs