Don’t waste your urine, my friend. You could use it to power your TV remote that you are so fond of.
I guess it is called the Non-Pollution Power (NoPoPo) battery. Basically, it s a simple chemical reaction to charge the battery. Soda, apple juice, water, saliva and of course urine reacts with the magnesium and carbon in the battery.
They claim that it can retain a charge for up to 10 years. Unfortunately, it would seem you can only recharge them 2 to 5 times. I guess that means you’ll have to keep pissing on your ex’s radiator.
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[...] On the plus side, if you can keep it alive you’ll not only be powering your alarm clock, but generating a small amount of oxygen. This also seems like a better powersource than your own urine. [...]