Again with the LED flashlights. Stay with me, though; these ones are more complicated than usual.

The EternaLight EliteMax is, beyond question, the most nerd-friendly flashlight ever made. It has a freakin' Configuration Mode, for Pete's sake. The only way they'll be able to top this thing is by making a light that plays Tetris.

And then there's the EternaLight Derringer, a neat little nugget that sells for less than a third of the EliteMax's $US99.99 price tag.