DEWALT DC9144 14.4-Volt XRP Lithium-Ion Battery Compatible with DEWALT 14.4-Volt tools DEWALT exclusive NANO-phosphate lithium-ion cells offer long battery life and durability: 2,000 recharges Lightweight design- 1.3 lbs No memory and virtually no self-discharge for maximum productivity and less downtime Requires Li-Ion compatible charger (DC9310, DC9320 or DC9319;