Technology

Wanted: Beer Drinkers

Scientists in Singapore have invented a battery powered by urine.

How It Works

The battery sandwiches copper, paper laced with copper chloride, and magnesium between two plastic layers. The "sandwich" is later laminated.

"When a droplet of human urine is added into the battery... the urine soaks through the paper between the magnesium and copper layers. The chemicals dissolve and react to produce the electricity," write Lee and colleagues.

Link.

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