USB Backpack become more popular on marketWith the development of the backpack market, more and more creative designs are popular in the market.
From a simple backpack with a little creative design, the backpacks are very different.
USB backpack is such a creative idea, so that when you go out, solve the problem that the mobile phone has no power. You only need to put the charging power in the backpack, without opening the zipper, directly plug the cable into the charging interface of the mobile phone, making your travel more convenient. More fashionable.
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