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About product and suppliers:
        Alibaba.com offers 3,454 usd port products. About 25% of these are power banks, 13% are sea freight, and 1% are backpacks. 

A wide variety of usd port options are available to you, such as 15001-20000(mah), 10001-15000(mah), and 9001-10000(mah). You can also choose from black, beige, and blue. As well as from free samples, paid samples. 

There are 3,469 usd port suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Malaysia, and Taiwan, which supply 96%, 1%, and 1% of usd port respectively. 

Usd port products are most popular in North America, Eastern Europe, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 3,454 with Other, 682 with ISO9001, and 53 with BSCI certification.