Banggood Dear customer， Thank you for choosing Banggood. We are sorry that the product doesn’t meet your satisfaction. Our service team have sent you an e-mail for some information. Have you received it? Please contact us after read it. We would highly appreciate if you could send us all the information listed here below: 1.Some photos of the shipping label, which can be found on the external side of the package; 2.The SKU number of the products you received. You can find this information on the label placed on the item itself; 3.Some photos or video to show the entity of the problem; 4.The order number and the product ID. It’s more convenient that we solve the problem after your cooperation. Thanks for your kindly understanding. Looking for your reply. Have a nice day. Regards, Banggood team  

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KKChan I had the same problem as you did. The problem is that there is an SS54 schottky diode across the current input (as protection) and its breakdown voltage is only rated at 40V. Anything above 40V will blow this diode. I changed the diode to a 1N4007 (not ideal but that was what I had) and everything works OK now.

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KKChan My unit blew its MOSFET with input current at just 5A. I had to change the MOSFET to an IRFP460 and then it works fine. I submitted my review but Banggood never published it. I guess they want only good reviews. I used to submit glowing reviews with "highly recommended" rating when I received good items from Banggood. But I don't bother now.

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