Boosting the voltage from a NiMh to usable levels for the LED is a bit rough. The NiMh cell will have voltage sag when we ask higher currents of it, so we end up boosting from ~1V up to 3.5-ish or so for the LED. If we wanted to drive the LED at 1A, that's easy for a Li-Ion 14500 cell to do, but from the NiMh cell we're suddenly asking for something like 3.5A from it. The alkaline will already have given up, but quality NiMh will hold up to this for a bit. Just not very long, as that's over 1C discharge, with voltage falling fast. The more the voltage falls, the more current we need to get our power output (because Watts = Volts*Amps).
I used to rebuild NiCd/NiMh tool batteries, and there are some cells out there that I wouldn't mind subjecting to that kind of abuse, but they are all larger than AA size. Eneloops are good, and can discharge surprisingly high drains, but the voltage is too much of an issue.
Interested, but I’m concerned about how Anduril will be ported for a boost driver, and of course the associated problems with boosting a NiMH/Alkaline.
I see myself using this light normally on 14500, where I would wish to have a max of ~600 lumens. But in case of emergency, it would be nice to also be able to run off of a AA/NiMH, where I wouldn’t want 600-700 lumens anyway to conserve power. I’d be fine with a max of ~100 lumens, which all chemistries should be able to handle.
Boosting the voltage from a NiMh to usable levels for the LED is a bit rough. The NiMh cell will have voltage sag when we ask higher currents of it, so we end up boosting from ~1V up to 3.5-ish or so for the LED. If we wanted to drive the LED at 1A, that’s easy for a Li-Ion 14500 cell to do, but from the NiMh cell we’re suddenly asking for something like 3.5A from it. The alkaline will already have given up, but quality NiMh will hold up to this for a bit. Just not very long, as that’s over 1C discharge, with voltage falling fast. The more the voltage falls, the more current we need to get our power output (because Watts = Volts*Amps).
I used to rebuild NiCd/NiMh tool batteries, and there are some cells out there that I wouldn’t mind subjecting to that kind of abuse, but they are all larger than AA size. Eneloops are good, and can discharge surprisingly high drains, but the voltage is too much of an issue.
Would it be possible to limit the power of the flashlight when running on NiMh on the basis of max optimal load for that cell chemistry? Unsure if that would be easier or harder
Would it be possible to limit the power of the flashlight when running on NiMh on the basis of max optimal load for that cell chemistry? Unsure if that would be easier or harder
This is mandatory.
—
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
heck I’m in… I am in the market for an AA edc and had just started looking…. My short list was the Utorch, lumintop tool 2 and sofirn sp10s!!!! so this would be great!!! BUTONLY IF IT CANRUN ON AA’s too…
interested if it supports alkaline/nimh as well. Not sure why there is a debate about the possibility, the original light does it, as do other lights in this size (Rofis R2). Perhaps adding Anduril and a small board is the challenge? Certainly the lower voltage cells have lower outputs.
Sorry, I only read through 2 or 3 pages of the thread.
—
PocketSammich wrote: I don’t need this, but I want it. Please sign me up.
Still interested!
Still interested as well…
Interested
I’ll have one
MascaratumB,
Boosting the voltage from a NiMh to usable levels for the LED is a bit rough. The NiMh cell will have voltage sag when we ask higher currents of it, so we end up boosting from ~1V up to 3.5-ish or so for the LED. If we wanted to drive the LED at 1A, that's easy for a Li-Ion 14500 cell to do, but from the NiMh cell we're suddenly asking for something like 3.5A from it. The alkaline will already have given up, but quality NiMh will hold up to this for a bit. Just not very long, as that's over 1C discharge, with voltage falling fast. The more the voltage falls, the more current we need to get our power output (because Watts = Volts*Amps).
I used to rebuild NiCd/NiMh tool batteries, and there are some cells out there that I wouldn't mind subjecting to that kind of abuse, but they are all larger than AA size. Eneloops are good, and can discharge surprisingly high drains, but the voltage is too much of an issue.
Interested, but I’m concerned about how Anduril will be ported for a boost driver, and of course the associated problems with boosting a NiMH/Alkaline.
I see myself using this light normally on 14500, where I would wish to have a max of ~600 lumens. But in case of emergency, it would be nice to also be able to run off of a AA/NiMH, where I wouldn’t want 600-700 lumens anyway to conserve power. I’d be fine with a max of ~100 lumens, which all chemistries should be able to handle.
Interested.
How did Wuben the magic in its E05? It runs on NiMH the same modes as on 14500, except turbo. Is this a matter of efficiency?
Smile, you cannot kill them all.
sounds good to me, interested for sure
Would it be possible to limit the power of the flashlight when running on NiMh on the basis of max optimal load for that cell chemistry? Unsure if that would be easier or harder
Interested
My reviews:
ROFIS R3 Multipurpose light , ROFIS MR50
This is mandatory.
Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights
Click this to go to signature links. I'm still around, just not reading many new threads.
Only just realised I haven’t explicitly expressed my interest. So… interested!
Very interested if the light comes with a lighted switch or dim indicator light (or is easily modded to have one)
Dual chemistry would be great to see!
Interested if it comes with nimh support and anduril
Interested
Interested
Interested
Interested!
Interested
You can never have too many torches........just not enough darkness
heck I’m in… I am in the market for an AA edc and had just started looking…. My short list was the Utorch, lumintop tool 2 and sofirn sp10s!!!! so this would be great!!! BUT ONLY IF IT CAN RUN ON AA’s too…
Problemes d'erection [url=https://www.viagrasansordonnancefr.com/]viagrasansordonnancefr.com[/url] meilleure pharmacie
Interested even if it only work with 14500.
Interested if it’s aa compatible. Could you somehow make the glass have a built in minus green filter?
interested if it supports alkaline/nimh as well. Not sure why there is a debate about the possibility, the original light does it, as do other lights in this size (Rofis R2). Perhaps adding Anduril and a small board is the challenge? Certainly the lower voltage cells have lower outputs.
Sorry, I only read through 2 or 3 pages of the thread.
PocketSammich wrote: I don’t need this, but I want it. Please sign me up.
Interested
Interested
Interested, dont have a light with LH351D emitter yet.
...where Frugal meets with Flashlight!
つ ◕_◕ ༽つ
Withdrawing my interest. DQG Slim AA is too good, it fills my “nimh/alkaline” support niche.
Price put me off!!!! same with max lumens on AA
Problemes d'erection [url=https://www.viagrasansordonnancefr.com/]viagrasansordonnancefr.com[/url] meilleure pharmacie
What s the latest news on this project?
Idiot proofing something only creates improved idiots.
Pages