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According to Japan's "Sankei Shimbun" reported on August 22: Japan Association for Electronics has newly developed and sold the water battery NOPOPO - only need to inject a little water to generate electricity.
The water battery weighs about 15 grams, is the same size as the 3rd battery, and the power is equivalent to the manganese battery. There is a water injection port on the positive electrode of the battery, and the battery can be charged with a special glass tube filling water of 1 ml. After the electricity is exhausted, it can be refilled, and it can be recharged about 10 times. The battery can be stored for a long time without being opened, making it ideal for use at home in an emergency.
A box of 20 batteries, special water-filled glass tubes and No. 1 and No. 2 battery converters are priced at 4,000 yen (approximately RMB 334).
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Sichuan Kangruntengpu Photoelectric Technology Co., Ltd. , https://www.kangruntoplighting.com