"The DEWALT exclusive NANO-phosphate lithium-ion cells deliver more run time, longer battery life and extra durability for up to 2000 recharges. The DC9180 18V Battery Pack with NANO Technology is compatible with DEWALT entire line of 18 Volt tools. Battery Charging Time hrs. 1, Battery Type NANO phosphate Lithium-Ion, NANO Technology Yes, Volts 18. Lightweight design only 1.5 lbs. same weight as a 12V Ni-Cd battery No memory and virtually no self-discharge for maximum productivity and less downtime 1-hour charger DC9310 charges all DEWALT 7.2V - 18V Ni-Cd/Ni-MH/Li-Ion batteries except Univolt batteries You need only one charger for multiple cordless products"