The way I understand this, is that it works by pulling every last joule of energy out of a battery. But beyond that, it runs more efficiently, depending on the amount of of turns in your coils, as you can adjust for efficiency or brightness. Another factor is how many bulbs you have hooked up, as it seems the more, the better. If you are interested, I would not worry about trying to understand how it works. We can both figure that out later :)