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About product and suppliers:
        Alibaba.com offers 311,078 portable power bank products. About 75% of these are power banks, 1% are humidifiers. 

A wide variety of portable power bank options are available to you, such as golden, beige, and black. You can also choose from 3000-4000(mah), 8001-9000(mah), and 4001-5000(mah). As well as from li-ion, electric, and cosmetic mirror. And whether portable power bank is free samples, or paid samples. 

There are 311,092 portable power bank 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 power bank respectively. 

Portable power bank products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 71,120 with ISO9001, 51,490 with Other, and 11,299 with BSCI certification.