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852 charger prototype products are offered for sale by suppliers on Alibaba.com, of which pcba accounts for 42%, power banks & power station accounts for 2%, and chargers & adapters accounts for 1%. A wide variety of charger prototype options are available to you, such as short circuit, protection and fast charger.You can also choose from over-charging, overvoltage and overcurrent charger prototype,as well as from cell phone, mp3 / mp4 player, and electric tool charger prototype,And whether charger prototype is 1 x usb, {2}, or {3}.