Use 'urine' to charge the battery

Few people think of making rechargeable batteries with salt water, even urine.

Modern warfare soldiers, using a lot of electronics, operate on batteries. When operating in remote or unsupported areas, these devices may become useless due to power outages. This is extremely dangerous, put the soldier at a difficult time.

That's why a Korean battery manufacturer, Metalcell, can charge with salt water, even urine.

With MetalCell batteries, military units can place them behind Humvees, bays, warehouses, military bases for years, for critical situations.

The shape of the MetalCell battery is like a battery 2,000 years ago.

Rugged MetalCell batteries resemble Baghdad batteries, dating back to the first centuries AD, 2,000 years ago. According to many researchers, Baghdad batteries are the world's first voltmeter.

The structure of MetalCell is extremely simple, including: the magnesium discs placed in the container, just add salt water can operate. Sodium in salty water reacts with magnesium, producing low voltage electricity but enough to power many devices such as laptops, flashlights, night vision ...

According to calculations, the battery can power the laptop for more than four hours, and re-loading until the magnesium discs wear out.

Soldiers can take the salt from the frozen food that they carry, or from the saltwater itself, to produce the appropriate amount of sodium. In particular, in very tight circumstances, they can recharge their MetalCell batteries with their own urine, an abundant source of sodium and are available.

Source: PopSci