Variable Wattage Boards, Watts, and Volts

[GrizzlyBaer]

I've been looking all over the place and can't seem to find my answer. How do VW boards like the dna 40 allow a device to run at much higher volts that the battery has? Batter is 4.2 but at 40 watts, the voltage is somewhere around 9 volts. This makes no sense to me. Can anyone explain the concept and actual technology (ie. part of the board) that allows this.

I'd love to hear a full explanation of how the board works as well but if someone can just answer the volts part that would be great!

 

[zoiDman]

If Ohm's Law has to stay in Equilibrium, it sounds like you would Trade Amps for Volts to make an PV's Output Voltage that is Higher than the Output Voltage of the Battery.

I think it is done with Pentagrams and Candles? But I might be Wrong.

 

[Technonut]

Buck-Boost Converters


https://www.youtube.com/watch?v=FT_sLF5Etm4