Will not support failed products, find another seller
In a purchase including two LED headlights, both of which were selected after careful consideration of their published performance numbers, one met its published performance figures, and the other fell well short. The underperforming unit appeared to have one failed battery cell, and so support at LED Supermall was contacted. That lead to a four month backwards and forwards by e-mail, in which LED Supermall claimed that the unit "fell within factory specifications", and was deemed by the factory to be "normal". LED Supermall then refused to respond to e-mails. Apparently, normal in this Chinese factory means that your light burn time is less than half what you state it to be, in this case, the light operated for about 90 minutes when it was supposed to operate for 4 hours. I downloaded the specifications page off the website and pointed out what the light was supposed to achieve; the response from LED Supermall was to remove the specification page from the item listing. LED Supermall refused to take responsibility for its failed light, and refused to replace or refund the item. The products for sale by LED Supermall vary widely in quality (I have had other items from this seller that have failed after some use), and it is not easy to pick which ones will be OK, and which ones won't. This seller will not guarantee the quality of the products that it sells. I'd recommend finding another seller that does provide support for its products.