The Teslacigs WYE 2 (II) 86W Box Mod is an innovative creation utilizing lightweight materials, featuring a wattage based output range, ingenious chassis material and design, and is powered by a single high-amp 18650 battery cell, thats not included. ... Powered by a single high-amp 18650 battery cell. Light weight simple and handy the WYE II for an 86w device is one of the lightest and most convenient mods for an everyday use!