The Eton Blackout Buddy H2O is a neat little emergency light that is activated with water. The onboard Magnesium-oxide batter reacts with water, supplying up to 72 hours of continuous light. Perhaps obviously, it will work in any weather condition, including submerged in water. Additionally, it comes in an environment-proof package which allows for up to 10 years storage without degradation.
www.etoncorp.com/en/productdisplay/blackout-buddy-h2o
Tags: Eton