Cell: ** cylindrical lithium ion battery cell 18650 with 3.2 volt & 3.7 volt ** cylindrical lithium ion battery cell 26650 with 3.2 volt & 3.7 volt ** lithium ion polymer battery cell with 3.2 volt & 3.7 volt Cell pack: ** used for electric vehicles, electric bikes, electric tools, electric toys, led lights, digital products, solar batteries, medical equipments, portable power supply and so on.