Water is awesome. It’s a refreshing beverage, a hangover cure, cleanser, and now it can power your calculators. The Water Powered Calculator has 3 water powered batteries. Each battery has a pair of electrodes made of a special alloy that produces electricity through a chemical reaction. The water will last you 2-3 months before evaporating and then you simply refill the cartridge with more water. It’s free energy! The clear plastic shell of this calculator lets you see what’s happening inside.

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Nopopo Eco Water Battery

Nopopo mean No pollution Power battery. This is another move by Japan to promote an Eco-friendly environment. This battery is amazing, it can be recharge by almost all kind of water. For example water, beer , cola and the inventor also mention human urine!! Once the battery is fully charge it is capable of powering up a LED flashlight. If the battery is flat, simply use a syringe to suck your liquid of choice up and then squeeze it into the battery. That it. very simple.

Specifications

• Two sets of two batteries (4 AA batteries in total)
• Proprietary NoPoPo hydro-electric battery from Aqua Power Japan
• Holds charge up to ten years
• Also charges with beer, sake, cola, or even urine
• Size: 9.65×2.75cm (3.75×1.08 inches)
• Current: 60mA-300mA
• Capacity: 1.6Ah-0.6Ah
• Voltage: 2.1V
• Can be charged up to five times
• Manual: Japanese

via japantrendshop