This is considered to be one of the latest
developments in
battery technology in Japan. Surprise!, NoPoPO or stands for No Pollution Power runs with any drinking
water or almost any other
water based liquid.

Nopopo water battery
NoPoPo perhaps is the the world’s first totally
eco and green battery that runs on water. The battery is
rechargeable and completely
recyclable. Thanks for the engineers who had been thinking of it night and days. However, keep in your mind; don’t think of it as a
battery, but rather as a small electric generator.
NoPoPo comes in a series of battery sizes where the batteries can be re-filled up to five times and with just a few drops of water being able to produce up to 1.5 volts @ 500mA of current. Assessments by the manufacturer support claim that a single AAA version battery can run a small handheld torch light for anything up to 20 hours. Magic, isn’t it?
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