Pee-Powered Portable Battery
Contrary to popular belief, you now can recharge a battery by urinating on it. The MetalCell, a unique and portable backup battery that charges from sodium, was designed by South Korean researchers in a bid to replenish electronics when in warfare.
Apparently the sodium in salt reacts with the magnesium plates and generates a dose of low-voltage power that’s enough to charge a laptop for up to four hours one single recharge of saltwater. At a cost of $200, I know what I will be packing on my next road trip or camping adventure.