DC9144 14.4V XRP Li-Ion Battery Pack iis compatible with DEWALT® 14.4 Volt tools. DEWALT® exclusive NANO™-phosphate lithium ion cells offer long battery life & durability: 2,000 recharges. Lightweight design- 1.5 lbs. No memory and virtually no self-discharge for maximum productivity and less downtime. DC9310 Charger Charges all DEWALT® 7.2V - 18V NiCd/NiMH/Li-Ion batteries (except Univolt batteries) so users need only one charger for multiple cordless products.