Those crazy inventive Asians are at it again. For those of you who are secretly water sport inclined, now you can have a alternative outlet for your zeal. (Aside from the toilet).
NoPoPo (Non-Pollution Power) Aqua Batteries are available in both AA and AAA form, although the company page shows they are producing the technology for all sizes of battery, and can only be currently purchased in Japan. The batteries can be recharged with various different fluids using the new development which forms electric power using liquid as a catalyst. The basic principle is that a mixture of magnesium and carbon reacts when mixed with a liquid to produce, in the case of the AA battery, up to 500 milliamp-hours (mAh) of life. Each time the battery is recharged it has a lower power level than the time before and the life cycle allows for about 3 to 5 recharges before disposing of the battery. Each battery can potentially keep its charge for up to 10 years which could be great for many life saving devices in remote locations. Since the battery does not contain mercury and other harmful materials, it can be easily disposed of without worry for the environment.
While it sounds just weird/gross, I think they may be on to something. In the developed world it could add much needed levity (Imagine: Someone running around the house having to pee so bad, but wants to find the batteries first. Or someone who wants batteries for the remote or something, but just can’t force any out, so they go ask their neighbor.) In the developing world, it would provide an environmentally friendly renewable battery source.