The Vision X.Fire E-Fire 1000mah wood spinner battery, This is the newest spinner variable voltage battery. The tube part is made of wood and with extraordinary designs. The wood spinner vv battery has following features: 1. Unique Design, extraordinary carvings are on the wooden tube, this is the biggest difference from normal spinner batteries. 2. Variable voltage, users can adjust the voltage output from 3.3v to 4.8v by spinning the knob at the bottom, each increment is 0.1v. 3. Battery cut-off,10 seconds. The button LED will flash 5 times to stops outputting voltage when the button is pressed for more than 10 seconds. 4. With the detachable eGo cover, no matter which clearomizer your using it will works on the unit with 510 threading or eGo threading, the battery looks great. As this battery comes with a detachable eGo cover, almost all clearomizer will work on the unit, such as the Vision V3, Kanger ProTank 2, Innokin I30S and many other clearomizer with 510 threading or eGo threading. Please note: * CHARGER NOT INCLUDED: Compatable chargers 420mA eGo Fast USB Charger or Joyetech 420mah eGo USB charger. * The Vision X Fire Spinner batteries button has a 5-click On/Off lock. Please press the button 5 clicks within 2 seconds and activate the battery. * Using the battery at a higher voltage output will drain the battery faster than at a lower voltage. We suggest to start with a low voltage and increase the voltage gradually until you find the right voltage for your atomizer/cartomizer. Brand: Vision Unit: 1pc Threading: 510/eGo Design: #1 Skull/#2 Pirate/#3 Ghost/#4 Skeleton/#5 Pterosaur/#6 Dragon/#7 Carnivorous plant Capacity: 1000mAh Size: Heigth 4.52" (115mm); Diameter .78" (20mm) Warranty:30 days.