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About product and suppliers:
        Alibaba.com offers 45,936 lithium-ion power pack products. About 4% of these are power banks, 1% are switching power supply. 

A wide variety of lithium-ion power pack options are available to you, such as free samples, paid samples. 

There are 45,900 lithium-ion power pack suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 99%, 1%, and 1% of lithium-ion power pack respectively. 

Lithium-ion power pack products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 21,641 with ISO9001, 7,784 with Other, and 5,690 with ISO14001 certification.