Ever travel to a place where electricity is totally unreliable and a drippy ceiling is all around? Then Bevol’s water-powered alarm clock should be packed neatly away for your next foray into the wild. The clock’s electrodes harvest energy from the water to fuel the simple LCD display. It even remembers what the time is while you fill it up with more hydrogen-dioxide fuel. The Webpage instructs users to squeeze in a wedge of lemon every five to seven weeks, probably to aid the conductivity. The gizmo is particularly travel-friendly because it doesn’t need batteries and the water can even be emptied during flights to avoid annoying leaks on clothing. Now, if only using a green gadget could even partially offset the jumbo jetliner-sized carbon footprint you took to go on vacation…