Joyetech eGo One Mega V2 kit is a new version of eGo One Mega. It is combined with a 4ml eGo One Mega V2 atomizer with a 2300mah eGo One Mega V2 battery. The battery comes with two modes optional: direct output and constant voltage output along with advanced dual circuit protection. It will give you a more unquie experience. CL series heads can be applied for it and battery display function can show the battery quantity very clearly.