Electricty is Cool...
I've noticed that there seem to be some misunderstandings concerning the power of this stun gun.
At an amperage of 11 mA and a voltage of 4,500 kV, yes, this weapon can produce about 49.5 kW. But that doesn't even mean that it could power a single kitchen appliance, let alone eighty homes, because it produces that wattage at a very low amperage. Let me put that into perspective for you; I'll use water as my analogy. Think of voltage as the quantity of water, and amperage as the strength of the water's flow. Wattage is the combination of those two factors. For example, if there is a great quantity of water (voltage), but very little flow of the water (amperage), then the wattage is just a big lake. Yes, it's quite large, but it's not going to take any boats downstream. Okay, maybe that was a lame analogy, but you get the point. Just because this stun gun can produce gratuitous amounts of voltage, it may seen like it has a lot of power, but with the amperage taken into consideration, in reality, it doesn't. It
can, in fact, be powered by a normal battery, since current draw is determined by amperage alone, and not wattage or voltage. Theoretically, I suppose that a device producing 10 million volts at 0 amps would have no current draw on the battery...but, besides the Poynting vector, within my knowledge, I do believe that that's impossible.
Anyway, look at this schematic:
It shows what a typical stun gun circuit looks like. Essentially, it works by taking a small direct current (from a battery), using an oscillating IC and a transistor to "convert it" into an alternating current (it's really a pulsating direct current), and then running it through the secondary coil of the transformer where it's amplified, and then it comes out of the primary coil. Then, the circuit collapses when the electrodes are shorted by the conductor, being human skin, in this case. Of course, that's all in layman's terms.
This particular design produces a constant current, whereas other stun guns that I've seen have a capacitor bank that is charged by the transformer, and then discharged by a switch. Actually, if I am not mistaken, that is the difference between a stun gun and a taser, unless they're just different names for the same thing.
This particular stun gun in the schematic, made from rudimentary components that can be found at your local electronics store, which is powered by a 9 volt battery, can produce about 2,000 volts. However, if there are any math whizzes reading this, don't turn that into an Algebra equation, because the power supply voltage is not proportional to the output voltage. A 4.5 million volt stun gun could also be powered off of the same 9 volt battery, for reasons that I explained earlier. In this schematic, a 9 volt battery was probably chosen not for it's power, but for it's capacity.
Damn, that was a long post; I should start charging people for these lectures.