A Water Activated Flashlight?

Weve all seen lemon batteries or potato clocks, but have you ever seen a water activated battery? [Nathan Stubblefield] was an American inventor (born 1860) who never got quite as much recognition as some of the other great inventors of the time, [Tesla, Bell, Edison etc] — though he did demonstrate some very interesting wireless telephony technology. In addition to dabbling with invisible radio waves, [Stubblefield] filed a patent for something called an Earth Battery, which makes use of two coils of dissimilar materials (a voltaic couple) submerged in water (or moist earth). As you can imagine, it wasnt overly effective, nor efficient by any means — but it worked.
[Lasersaber] has been playing around with the “Stubblefield Coil” recently, and designed a working flashlight using the theory. He designed a 3D printed coil holder that could easily wrap copper and magnesium strips to make a coil. Three of these elements are connected in series to create a water battery (and flashlight handle).
Not finished yet, but I plan to wrap it in a quick-drying porous material. That way, I hope I have time to dip the flashlight into a bucket of water and get it working when I need it. . You need more water 30 minutes before. It won't last forever.