Hi I just bought a ipv mini that is a 30 watt device and I bought a 18650 battery with it and a peakomizer v2. I put the watts all the way up to 30 and it only goes up to 3.9 volts but on the box it says it's soppost to go up to 8 volts. How to I raise the voltage on it? Can I only go up to 3.9 volts on my atomizer? I have a .5 ohm coil btw.