14:24

Huge 30W ceramic core LED light (with schematic)

11:25

Por qué esta turbina eólica verdaderamente omnidireccional es genial

26:01

Inside a Nokero solar light (with schematic)

12:05

Las bombas Wirtz son muy ingeniosas

31:46

Why do hurricane lanterns look like that?

13:06

HUGE Magnet VS Copper Sphere - Defying Gravity- Will a Neodymium Magnet Float Inside?

12:29

"Salt" Batteries are FINALLY Here?! Sooo should you use them?

13:08

Horrible eBay ultraviolet floodlight (with schematic)