The Dremel 8000 cordless tool is the first power tool in the world to feature Li-ion battery technology. Li-ion batteries can be charged at any time, have no self-discharge and weigh up to 30% less than conventional NiCd cells. Most importantly, Li-ion technology allows this cordless tool to perform like a corded tool. In addition to the tool, the kit features a three hour charger, a soft bag and 60 original Dremel accessories.