DC9180 18V battery pack with "NANO" technology is compatible with Dewalt 18V tools Dewalt exclusive Nano- phosphate lithium ion cells offer long battery life & durability: 2,000 recharges Lightweight design 1.5 lbs. No memory & virtually no self-discharge for maximum productivity & 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