Re: SureFire HellFighter - DOA
nice, so these are the BB-2590 batteries?
The Non-Rechargeable, BB-5590/U Manpack Primary is of Li-SO2 chemistry ($308.00)(NSN: 6135-00-439-9450)
I've only seen this chemistry used in cardiac defibrillators:thinking:
Lithium-sulfur dioxide cells have a metallic lithium anode (the lightest of all the metals) and a liquid cathode comprising a porous carbon current collector filled with a sulfur dioxide (SO2) solution. They deliver a voltage of 2.8 V and are cylindrical in shape, in ½ AA to double-D format, with spiral electrodes.
Lithium-sulfur dioxide cells have a high energy density (250 Wh/kg) and a good capability for delivering repeated bursts of high power (up to 400 W/kg). This capability derives from the spiral construction and is utilized in most of the applications addressed by this type of cell.
This kind of cell is mainly used in defense applications, though civil applications also abound.
I'm imagine the shelf-life to be quite long, upwards of 10 years :candle:
What is the alkaline version called?
Fair enough, odd though as I don't recall having this issue with my Beast.
Any idea if it'll eventually disappear?
Thanks for your speedy response
The misting effect can be observed with any surefire light, leave it on long enough and dunk it in ice water you'll notice the fog like condensation on the metal reflector and once awhile on the optics. It can also be observed from M@g hotwires where the far edge of the metal reflector contacts the window. If a blowfan is kept close to the window the fog will start to build from the window down.
I'm inclined to believe Surefire's assembly complex may either be a humid environment or the reflector/bezel fabrication is done in a cold environment where dew collected during and after turning from CNCs is condensed and retained rather than evaporated. As you may already know, aluminum is a great thermal conductor, leave a light in a 70F room for sometime, pick it up and it'll "feel" like 60F. I think the assembly of these components in this state will effectively seal the water inside as well as preventing water entry from the outside. If this is the case, there is no way of "cooking" water out of them unlike incan heads where the lamp can be removed and the bezel resting on a warm transformer or what not for a number of hours.
This phenomena is not observed in other lights, and I speculate A/C on the shop floor with humidity in the air is not the best combination to assemble flashlights. At minimum the parts [PCB excluded] should be warmed up prior to assembly, but it doesn't effect the output and I doubt many people care