The iTaste VV is a great passthrough battery with many advanced features. The VV battery is a variable voltage/variable wattage 800mAh passhtrough, so you can continue to use it while it’s charging. Voltage can be adjusted from 3.3 volts to 5.0 volts in .1-volt increments. Wattage can be adjusted from 6.0 to 11.0 watts in .5-watt increments. The VV will also display your remaining battery life, atomizer resistance and number of puffs taken. With 510 and eGo threading, this battery can accommodate virtually any clearomizer, cartomizer or tank.