What is the difference between a solar backpack and a normal bag?
The solar backpack (solar folding bag) looks the same as a normal backpack in appearance. But the difference is that it has a solar panel on the front. This solar panel absorbs solar energy and converts it into electric charge. At the same time, it stores the absorbed charge in a generator box.
The factors you consider when buying a solar backpack are different from ordinary bags. You should...
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