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The world’s smallest key-filling smartphone charger

The world’s smallest key-filling smartphone charger

This small charger is powered by human power. Turn the key in it and the mechanical energy will be converted into electricity. This way the phone will continue to charge. This invention is suitable for people who are hiking or doing other activities in remote areas. They can range from geologists to wildlife experts.

This way the charger is always available and can charge items freely. So if you have to make a phone call, send a message to someone, light a flashlight or show your presence to friends, this charger is the solution to all these problems.

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