Absolutely fake.
Quote:
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The micro battery is a next-generation technology with a size 30 times smaller than current battery that can quickly charge 1,000 times faster
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If they had battery technology like that they would sell it to Energizer and retire richer than Bill Gates. There are (unfortunately) hard physical limits to what batteries can do.
As someone else alluded to, the device itself is much less volume than a normal human breath. That means, in order to work, it would have to remove dissolved oxygen from the water faster than a person could inhale!