Just read this thread in detail and that is exactly what happened to my sister using the Surefire batteries I supplied her with an E2. Not once, not twice, but three times from a single box of 12. Light worked fine, next time she used it completely dead without the faintest of amber glow. Wish I had saved the batteries for analysis, particularly to find out if it happened to both cells in the light or just one of the two.
Now I use and give to family members the Sanyos which I get for a dollar each. Thus far they have seemed pretty reliable.
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milkyspit said:
You also may have shed some light on the SureFire sudden death mystery. If those cells continued to rise in temperature even after testing on them ceased, the cells could conceivably trip the thermal shutdown protection system AFTER the flashlight has been turned off, which explains why we've had various reports of people using a flashlight just fine, turning it off and setting it on the mantle, only to find the following morning that the light wouldn't even turn on.
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