Blackout Buddy H2O runs on water to provide emergency lighting

Blackout Buddy H2O runs on wat...
Eton's Blackout Buddy H2O is small and stowable
Eton's Blackout Buddy H2O is small and stowable
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Eton's Blackout Buddy H2O is small and stowable
Eton's Blackout Buddy H2O is small and stowable

It's the big paradox of emergency-use flashlights ... by the time you eventually need to use them, their batteries have died. Eton's new Blackout Buddy H2O, however, will reportedly still work after sitting for up to 10 years. And to turn it on, you just add water.

This latest member of the Blackout Buddy line has a magnesium-oxide battery, which starts delivering power to the light's three LEDs when exposed to H2O. To initially fire it up, you dip it into a small cup of water, or pour water into its battery compartment. After that, it will keep going continuously for up to 72 hours – if it starts to dim within that time, you simply add more water.

The device is only about the size of a cigarette lighter (so it can easily be stashed), and is claimed to even work underwater.

It is a one-time-use product, so it's just as well that its battery contains no toxic mercury, hexavalent chromium, cadmium or lead. It also only costs US$10, so you won't be throwing away an expensive item once you're done with it.

Source: Eton via Popular Science

Mel Tisdale
Being a one-time-use product, it would be even better if it had its own water supply that was released by some deliberate act, much in the way that a fire extinguisher is activated. Such a version needn't be any larger. They could be sold in packs of ten, especially in earthquake zones.
Bob Flint
Would spit or urine work?
It should be made to also run on urine straight from the source. You might not have water to dip it in, but give it a few hours and I'm sure you can manage to find some "water" to add...
@Bob Flint
Urine will work. I didn't ask about saliva.
Eton Corp's tech support manager says it will work with straight urine.
I'm going to grab a few.