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About product and suppliers:
        Alibaba.com offers 4,312 external battery pack/portable charger products. About 89% of these are power banks, 1% are rechargeable batteries, and 1% are battery packs. 

A wide variety of external battery pack/portable charger options are available to you, such as black, transparent, and silver. You can also choose from li-ion, battery pack, and li-polymer. As well as from 9001-10000(mah), 15001-20000(mah), and 5001-6000(mah). And whether external battery pack/portable charger is prismatic, or pouch. 

There are 4,334 external battery pack/portable charger suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 99%, 1%, and 1% of external battery pack/portable charger respectively. 

External battery pack/portable charger products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 1,010 with ISO9001, 428 with Other, and 260 with ISO14001 certification.