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    anybody else get the dealextreme 100mw laser?

    Just to give my two cents, I ordered the 100 mW laser a couple weeks ago at a price of ~$99. Because they had not yet shipped when they lowered the price to $94.91, I sent them a mail asking for a discount or extra item. To my surprise, within minutes they replied saying they will send along...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    The 14500 and 10440 cells I ordered from FifthUnit arrived--I'll try to test them tonight. The L91 and L92 lithiums worked very well on my camping trip, though. A bit expensive, but the long shelf life is a nice bonus. -Scott
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    Family member concerned re UV from this light

    Now that's a very interesting idea and one I didn't consider. In fact there are probably lots of things in the vicinity that could have fluoresced, like the eye drops perhaps. I'm fairly sure it wasn't a tracking laser as they had a separate thing for that. The flashes were definitely timed...
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    Fifth Unit Flashlight Shootout

    Hi all--I just got back from my (long!) camping trip. I also got a shipment of some 10440 and 14500 cells as well as another headlamp, but I haven't gotten to try them yet. A few things: The AA and AAA lights, which were disappointing on alkalines and NiMH, ran great on E2 Lithiums. Sadly...
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    Fifth Unit Flashlight Shootout

    Certainly! The headlamp was cheap--about $6. They have a new 3W model (for about twice the price), but mine is the older 1W and is still more than adequate for my purposes. -Scott
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    Fifth Unit Flashlight Shootout

    That's an incandescent, sold here: http://contents.fifthunit.com/html/products.5th/sku.686.html -Scott
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    10 Watt at Fifth Unit

    I don't know about the FAKSE, but I did some beamshots of their other "10W" GLIMT here: http://www.candlepowerforums.com/vb/showthread.php?t=131495 I've been happy with it (and the others) so far, but I haven't yet used them extensively. -Scott PS: The Ultrafire AA (WF-602A1) does much better...
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    Family member concerned re UV from this light

    This is sort of a tangential comment, but--I know that I can see well below that. I don't know exactly how far below, but possibly <200 nm. I had LASIK surgery not long ago where they use an excimer laser (the common ones are 193 nm, although they go up to around 350), and I could very clearly...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Yep, that's certainly true. Hmm, maybe I should hook it up to an o-scope? I could put an 0.33 ohm resistor in line, and measure the voltage across it to see how the current varies. Anyhow, here are the numbers I measured: WF-602A1: Voltage Current 3.0 0.68 3.1 0.66 3.2...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    These lights are not my only ones :). These are essentially emergency lights; something I can stuff into a pocket and have handy in case I need it quickly. Or give to a friend that forgot his. I have other, more powerful lights for general use. Thanks for confirming that 10440's work...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Well, that seems very consistent with my measured numbers: your NiMH batteries are going to be in the 1.2-1.4 V range, and there I measured between 0.99 and 1.45 A current. So your measured 1.17 A is right in line for that range (especially assuming some voltage drop), and 1.8 hours total...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Yep, that's right. I'm using the WF-602A1 and the WF-602C on a regulated bench supply. I guess your results are fairly consistent with what I saw--the current started dropping fast above 3 volts. I don't know if it would have hit 0.29A, but it might have gone as low as 0.5A. That's a pretty...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Some power numbers I generated: AA AAA Voltage Current Power Current Power 0.4 0.04 0.02 0.05 0.02 0.6 0.07 0.04 0.08 0.05 0.8 0.20 0.16 0.22 0.18 1.0 0.61 0.61 0.64 0.64 1.2 0.99 1.19...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Have you tested the statup voltage on your UltraFire? I found that mine was a fairly consistent 1.3. That's above nominal voltage for NiMH, and about where the most are after the initial "peak" voltage burns off (doesn't take long). Maybe you got lucky with your circuit, or you have a...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Cool, it looks like L91 is the product number for the Energizer AA Lithiums. And when I googled the number, I found a nice datasheet: http://data.energizer.com/PDFs/l91.pdf#search=%22L91%20%22 Looks like the discharge curve stays reasonably flat until it hits 1.3V, where it drops off quickly...
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    Batteries for UltraFire AA and UltraFire Mini AAA

    Aha! I just found that a CRV3 battery can be split into two AA-size 3V batteries. That would do the trick for the UltraFire AA, at least if I can find them for less than the $11 the grocery store charges. Any similar tricks for AAA's? -Scott
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    Batteries for UltraFire AA and UltraFire Mini AAA

    As many of you know, these are nice little units for the price, but they have a flaw: their regulator circuit requires 1.2-1.3 volts to start. In fact, the light produces output on as low as 0.2 or 0.3 volts, but only after it has started. Unfortunately, this means that NiMH batteries--at...
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    Fifth Unit Flashlight Shootout

    Beamshots of 5 of my current lights vs. 5 I just got from FifthUnit.com. 1st row: Pelican MityLite 2xAA, ElektroLumens XM-3 2xAA, Unnamed 2xCR123A 2nd row: Unnamed 1xCR123A, MXDL 3W 3xAAA, 5th Unit 1W Headlamp 3xAAA (low beam) 3rd row: 5th Unit 1W Headlamp 3xAAA (high beam), 5th Unit Ultrafire...
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    Upgrade from XM-3?

    Yep, that was pretty much my reasoning. The 12V Xenon is also for blinding my friends and playing lightsaber in the campfire smoke :). We also have ordinary gas lanterns for area lights, which I think are more cost effective when portability isn't a concern. I haven't seen a really good LED...
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    Upgrade from XM-3?

    Oh, I almost forgot: a story. On the last camping trip I went on, I found myself hiking back on a trail with my friends. It was getting pretty dark, but we were making good time so I didn't want to stop to break out a flashlight. Well, eventually we rounded a hill to the shadowed side, it got...

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