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About product and suppliers:
        Alibaba.com offers 2,012,657 power supply products. About 17% of these are ac/dc adapters, 3% are switching power supply, and 1% are power banks. 

A wide variety of power supply options are available to you, such as 1 - 50w, >500w, and 201 - 300w. You can also choose from single, dc, and multiple. As well as from 220v, 380v, and 110v. And whether power supply is free samples, or paid samples. 

There are 2,012,870 power supply suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Hong Kong, which supply 99%, 1%, and 1% of power supply respectively. 

Power supply products are most popular in North America, Domestic Market, and South America. 

You can ensure product safety by selecting from certified suppliers, including 333,665 with ISO9001, 127,162 with Other, and 36,100 with ISO14001 certification.