i have no idea, I thought that trustfire or Smartfire are a spin-off .
Don't know about the lights, but it seems the batteries are made by different companies as Trustfires are generally better.
That doesn't necessarily follow at all. But it doesn't matter, as neither brand is any good anyway.The 'fire' logo on both Ultrafire and Trustfire batteries are the same therefore they are made by the same company.
Those reviews are worthless.The Ultrafire batteries have some very good reviews on DX from buyers.
Please read this thread instead.I have some on the way. I'll let everyone know if they are any good and how they compare to my Ultrafires.