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About product and suppliers:
        Alibaba.com offers 148,824 portable usb charger products. About 59% of these are power banks, 24% are charger, and 1% are camera charger. 

A wide variety of portable usb charger options are available to you, such as black, blue, and beige. You can also choose from 3000-4000(mah), 7001-8000(mah), and 15001-20000(mah). As well as from free samples, paid samples. 

There are 148,738 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 30,374 with ISO9001, 21,304 with Other, and 5,316 with ISO14001 certification.