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A follow up:
I just went to see how my Surefire A2 (Aviator) was doing in its run down test. When I looked at the computer screen, I saw there was a "dip" in the curve. I waited just a few minutes and saw the light dim dramatically, and another dip on the computer screen.
Since I had seen this some time ago with a Surefire L2, I realized the flashlight was overheating and shutting down the electronic control. It cycles between reduced output and cooling, and then full output again until it over heats again.
Further, both the L2 and the A2 get so hot you can't hold them in your hand! And, the Sanyo CR123 batteries take the heat and keep on, err...cooking?
We have had no such problems with the non-electronic Surefires such as the G2. In fact, the G2 was impressive!
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