WA1111 Bulb and IMR Cells ?
- Thread starter Bob96
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Not without a lot of resistance. It can handle smaller IMR cells (16340's are fine), but the 1111 can't handle the bigger ones, like the 26500's. I don't remember the largest IMR cell you can safely use with the 1111 - 18500's are OK IIRC, but I'm not sure about 18650's.
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It depends on host.
Some host with lot of total resistance will work OK but close to instaflash.
In this case, soft start is a big bulb saver.
Linger
Flashlight Enthusiast
same, 1111 of 2x IMR 18650: very white, lots of light, good hot-spot to throw a few hundred feet. With the easy ability to stash another 2x or 4x 18650, this is my go-to incan combo
Justin Case
Flashlight Enthusiast
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I've run a WA1111 with 2xIMR26500 successfully using an FM G4 D26 Sunlight and FM Deep Turbo C head in an FM 2x26500 SureFire C threaded host. Tail switch is a McClicky.
Expected tail current is in the 3.8A-3.9A range. Even if you have only 100mohms of parasitic resistance in your flashlight system (switch, spring contacts, socket contacts, etc), that translates to a parasitic voltage drop of about 0.4V. So you can be somewhat close to the approx instaflash point of 8.3V from Lux Luthor's destructive incan table for the 1111. But clearly, the 1111 can definitely work without flashing. As FM says above, it depends on the host and how much parasitic resistance you have in your light. One thing to note about Lux's tests. He directly powered his lamps from a bench power supply using thick gauge cables to a Kiu socket. His setup had only about 20mohms resistance. So you have to factor in your system's resistance as well. The flip side is that power was delivered to the lamps slowly (effectively, a very slow soft start) since Lux had to turn his power supply knob to increase the input voltage. Thus, for a flashlight application, a soft start will also help.
Expected tail current is in the 3.8A-3.9A range. Even if you have only 100mohms of parasitic resistance in your flashlight system (switch, spring contacts, socket contacts, etc), that translates to a parasitic voltage drop of about 0.4V. So you can be somewhat close to the approx instaflash point of 8.3V from Lux Luthor's destructive incan table for the 1111. But clearly, the 1111 can definitely work without flashing. As FM says above, it depends on the host and how much parasitic resistance you have in your light. One thing to note about Lux's tests. He directly powered his lamps from a bench power supply using thick gauge cables to a Kiu socket. His setup had only about 20mohms resistance. So you have to factor in your system's resistance as well. The flip side is that power was delivered to the lamps slowly (effectively, a very slow soft start) since Lux had to turn his power supply knob to increase the input voltage. Thus, for a flashlight application, a soft start will also help.
GunSmoke16610
Enlightened
Runtime is pretty short, I think. I haven't tested it but I'll bet it's around 20 minutes or so. Still, it's a nice setup.
It's this one: http://www.candlepowerforums.com/vb/showthread.php?t=265258
It's this one: http://www.candlepowerforums.com/vb/showthread.php?t=265258
Someone here on the forum (I believe DM51) gave an easy formula to get runtime: divide battery capacity by bulb current draw, then multiply by 48 to give you usable minutes).
So using the 1111 w/ 2xIMR 18650s as an example:
IMR 18650 @ 1600 maH / 3700mAH draw of WA1111 x 48 = 21 minutes runtime
Great guess curtispdx!!
GunSmoke16610
Enlightened
Thanks guys. I am running a WA1111 with 2600mAH 18650 cells, run time is better using 30% power of the the AW soft start, but I would like to see it improved.
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