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About product and suppliers:
        Alibaba.com offers 179,956 portable usb charger products. About 59% of these are power banks, 23% are charger, and 1% are camera charger. 

A wide variety of portable usb charger options are available to you, such as black, red, and golden. You can also choose from 15001-20000(mah), 3000-4000(mah), and 4001-5000(mah). As well as from free samples, paid samples. 

There are 179,897 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 36,697 with ISO9001, 29,681 with Other, and 6,352 with ISO14001 certification.