Delivered in an impressive presentation box, this Innokin Oceanus iSub VE Starter Kit really is something special. The Oceanus mod features superb styling. It not only looks good, it also feels incredibly comfortable in the hand. To deliver its 110 Watt maximum power output, the Oceanus mod needs a single 20700 (3000mAh) battery. For minimum hassle, 2 batteries are included in the kit!