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About product and suppliers:
        Alibaba.com offers 157,645 portable usb charger products. About 53% of these are power banks, 25% are charger. 

A wide variety of portable usb charger options are available to you, such as 15001-20000(mah), 3000-4000(mah), and 9001-10000(mah). You can also choose from beige, black, and blue. As well as from free samples, paid samples. 

There are 157,558 portable usb charger suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and United States, which supply 99%, 1%, and 1% of portable usb charger respectively. 

Portable usb charger products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 30,005 with ISO9001, 27,620 with Other, and 5,130 with BSCI certification.