Joule Thief — The Secret Technology of the Ancient Pre-Ssorbonites
The Joule Thief energy scrounger. This little puppy will suck residual energy from depleted batteries and other low grade sources like eSnort – addled Orboite brainiums. Here it's running off a dead AA battery, and has been for 4 days. More or less.
Why, I'll bet even a double-nought dimwit could wangle wee willy's watts enough to light up this bulb.