Never trust a battery with FIRE in the name: Surefire, Trustfire, or Ultrafire. As said above, their quality is subpar and they over-rate their battery specs. Poor choice.
Battery Basics for Mods
Read the above blog and use only the batteries in the list of IMR and IMR/hybrid batteries. I recommend the red AW IMR batteries, but buy them only from reliable vendors like RTD Vapor, Lighthound, or Illumination Supply to avoid getting counterfeits. Buying batteries from Ebay or Amazon is extremely risky.
AW Batteries - Authorised Dealers
