They vape at 50 watts by using a very LOW Ohm coils, Sub Ohm (That's Sub 1 ohm coils). Somewhere in the .3 to .1 ohms (that is POINT 3, as in 3 tenths, to POINT 1, as in 1 tenth, of an ohm).
If you do the math 50 watts from a .3 ohm coil is only 3.87+ volts. With a .2 it is 3.16+ volts and a .1...