Requires one 18350 flat top battery. It is not ego cone threaded but has a recessed connection to accept any recessed 510 threaded tanks such as Vivi Nova, eGo Crystal's, Version 1 and 2 and, the ever popular Protank's, both full size AND Mini will work and look great on this pipe! It will aslo accept eGo-threaded devices if a 510-eGo adaptor is used!