The best I have seen was "Mailfire", could explain Royal Mail's attitude to shipping Li Ion cells.
I dont really believe that "Ultrafire" is actually a brand name, but a a sort of "free for all" brand name used by a lot of different factories.
Trustfire at one time were not too bad, as reported on the "Torchy" website, but they went down the drain eventually.
My avatar is a poor likeness.