A South Korean group created Metalcell, a battery with militaries in mind. When a soldier relies on electronics in battle, sometimes those electronics run out of power at the worst times. With the new battery, soldiers only need to add saltwater to the battery in order to charge their electronics for up to 4 hours. If they are low on saltwater, urine will do the trick... something that is always hand! Similar to Baghdad batteries, these batteries are innovation at its best!
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