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Our phones are not just for calling. Smartphones have become an important tool for detecting our health, interacting with our vehicles and entering the virtual world.

But the cell phone battery and charging problems have been bothering us.

Recently, some have tried to charge smartphones by transmitting or capturing the kinetic energy of the user's movements wirelessly. Now researchers have invented a new way to use the surrounding light source to charge the phone.

According to foreign media reports, France Dracula scientists have developed a new technology, the use of light as a new energy response. In fact, it is a thin and flexible solar cell that can be made using ink jet printers.

The low cost of these foldable sheets, which consist of a unique conductive plastic that captures energy from solar and artificial light, makes the technology more versatile. A layer can be printed on an electronic device, or a larger sheet can be fixed to capture more light on things, such as a backpack. Then the backpack will be connected to the device.

You can also imagine printing it on a T-shirt and using it to charge your phone.

These solar cells can be printed in just an hour, and can be customized to shape and color, or even transparent. Although researchers are still looking for ways to reduce solar charging time, they believe the technology is almost ready for real-world applications.