Trustfire only makes a protected battery to my knowledge. I used to use them in a BB until I had one go into thermal runaway. I don't use them anymore for this reason. Many here on ECF have a saying -- Never trust a battery with the name "fire" in it.

Protected Trustfire battery that went into thermal runaway.
Never use the un-branded
batteries that some vendors include with their mod kits. Spend a few more bucks on better quality batteries such as Panasonic, AW, Sanyo, or Efest. Don't skimp on the charger either. Pila, Nitecore, and Xtar are the better quality brand names.