1 D alkaline flashlight

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FlashMax
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1 D alkaline flashlight

Hi to all BLFers, a few days ago I managed to put my hands over a bunch of D alkaline cells and I wondering if you guys can recomend a good led flashlight for a single D cell.

Thanks

Max

Max

Chatika vas Paus
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Lumintop SD4A

I am a beginner in everything.

 

Arnold

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Leviatan wrote:
Lumintop SD4A

I’m not saying it can’t as its clearly in their description. But a single alkaline D cell will probably only allow about 1 amp of discharge at best.
Comfychair tested this way back when someone was considering a 4D maglite with a 7135 driver.
For a 1D to work it would have to have a boost driver. Roughly if the cell could give 2 amps you would only see 1 amp or less at the led.
Switch to a 3D or 4D then it becomes more possible to have a usable flashlight.
Also when you ask a Alkaline cell to work hard its capacity drops considerably.
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Thanks a lot, I will wait for bangood to restock it. Very cool flashlight.

Max

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moderator007 wrote:
Leviatan wrote:
Lumintop SD4A

I’m not saying it can’t as its clearly in their description. But a single alkaline D cell will probably only allow about 1 amp of discharge at best.
Comfychair tested this way back when someone was considering a 4D maglite with a 7135 driver.
For a 1D to work it would have to have a boost driver. Roughly if the cell could give 2 amps you would only see 1 amp or less at the led.
Switch to a 3D or 4D then it becomes more possible to have a usable flashlight.
Also when you ask a Alkaline cell to work hard its capacity drops considerably.

Wow! That was Richard, only a month after joining here! He was once a newb like me! Now, he’s everybody’s favorite source (in USA anyway) for flashlights and parts.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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FlashMax wrote:
Thanks a lot, I will wait for bangood to restock it. Very cool flashlight.

A-zon has it on sale now for about BG price after discount,… just saying.

Move towards the light.

FlashMax
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Thank for all the info, very good material Smile

Max

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Thanks!

Max

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I can’t think of too many 1-D designs. The closest would be one of the single 32650 models, but even then they are not designed primarily to be run at voltages this low. If they have low voltage protection, they flat out won’t run off a single D alkaline. Furthermore, Alkaline resistance, voltage sag, current draw limitations will severely limit performance. Alkaline leaks are a big problem as well, which can increase occurrence in high-draw applications.

I am not sure why, but the 32650 cell size never really caught on. But I would start your search with that, and hopefully you can find one with low voltage capabilities.

Examples (at least physically. I am not sure how well these run with alkaline cell):
Trustfire TR-A9
https://www.amazon.com/Kingzer-TrustFire-TR-A9-2-Flashlight-5-Mode/dp/B0...

$$$ Dive / camera lights
https://www.amazon.com/Foxpic-MK-24A-Flashlight-Underwater-Photography/d...

https://www.amazon.com/Archon-D34VR-Diving-Underwater-Flashlight/dp/B071...

Any reason why you are against the old tried and true 2D mag?

If it were me, I’d go with the old school Fulton anglehead and upgrade it with an LED PR bulb or keep it incan. I had one of these for decades and used it all the time on camping trips with my friends.
https://www.amazon.com/5ive-Star-Gear-Anglehead-Flashlight/dp/B00AF323JS...

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kramer5150 wrote:
Is the Lumintop SD4A compatible with 1-D cell? It really doesn’t say one way or another. It would be safer to assume not.

From the below image, it’s pretty clear to me that you can use 1-D cell, but you are obviously not going to get 1000 lm output from it …

kramer5150
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Oh oops!! cool.

FlashMax
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Maybe they only states the size of the cell but not the type. It would be good if someone confirmed that and could tell us what output was obtained if án alkaline was used.

Max

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A standard alkaline D cell is what capacity? Isn’t it over 10,000 mAH? It’s not like a single AA cell. I know that should be obvious, but whenever we’re talking about single-cell alkaline, we are usually thinking about those small cells that can’t push much. I’m not sure if a single D cell can do 1000 lumens, but I bet with a good driver it can get into the several hundred lumens range.

Edit: just looked and found this test on HKJ site where he tested a NimH D cell and found it could do 10A draw easily. Converting to voltage, you’d have enough to get the 3A needed for 1000lm output from a XPL HI.

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Chatika vas Paus
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I bought a sd4a with xp-l hi in mid-January. It should arrive next month. If you want I’ll make a movie which shows how it works on one D battery. And how long.

SD4A review

edit
I bought it for $ 37.79. Sometimes the price goes down, so if someone wants to buy, I advise you to watch it

I am a beginner in everything.

 

Arnold

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Yeah, I think it would be great for all of us. Thanks a lot

Max

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DavidEF wrote:
A standard alkaline D cell is what capacity? Isn’t it over 10,000 mAH? It’s not like a single AA cell. I know that should be obvious, but whenever we’re talking about single-cell alkaline, we are usually thinking about those small cells that can’t push much. I’m not sure if a single D cell can do 1000 lumens, but I bet with a good driver it can get into the several hundred lumens range.

Edit: just looked and found this test on HKJ site where he tested a NimH D cell and found it could do 10A draw easily. Converting to voltage, you’d have enough to get the 3A needed for 1000lm output from a XPL HI.

Yeah Not much testing has been done with Alkaline D, so its a good point to be made.

NiMH-D cells are very robust and can deliver a TON of current.

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Pete7874 wrote:
kramer5150 wrote:
Is the Lumintop SD4A compatible with 1-D cell? It really doesn’t say one way or another. It would be safer to assume not.

From the below image, it’s pretty clear to me that you can use 1-D cell, but you are obviously not going to get 1000 lm output from it …

!{width:75%}http://www.lumintop.com/wp-content/uploads/2016/01/20160129204852_56518.jpg!


The description says D cell and not which type. As I stated before , I dont think its gonna pull more than about a 1 amp from a new alkaline D cell. Thats maybe in the 500ma range to the led. Now a Nimh D cell is a whole different ball game (zebralight sc5 comes to mind). The OP ask about a flashlight that uses D alkaline cells. I for one would love to see the output with a alkaline cell. I have a few 2AA maglite mini’s I cut down on the lathe and made them in to a single cell mini. I used a boost driver and there only pushing about about maybe 100 lumens at best with a AA alkaline. With a Eneloop i’d guess 200 lumen’s or slightly more.

FlashMax
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Hi, did you test it with an alkaline D battery to check performance?

Max

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Both eveready and Rayovac sells single D cell Flashlights, if you don’t mind the low luminous output. Silly

and on the first day he said "Let there be light"...

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Big Smile

Max

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For anyone wondering, the Lumintop SD4A also works with alkaline D cells. To my eyes there seems no difference between output on new alkaline D cell versus fully charged NiMH D cell (output on turbo for the first 30 seconds or so). No surprise, turbo output on 1xD cell is lower than on 4XAA cells. Measuring tailcap current was not easy, my DMM read 2.0-2.7A on turbo with a NiMH D cell.

I did not do any runtime tests.

(Edit: correcting typo with tailcap current)

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kramer5150 wrote:
... If it were me, I'd go with the old school Fulton anglehead and upgrade it with an LED PR bulb or keep it incan. I had one of these for decades and used it all the time on camping trips with my friends. https://www.amazon.com/5ive-Star-Gear-Anglehead-Flashlight/dp/B00AF323JS/ref=sr_1_fkmr0_1?ie=UTF8&qid=1516991213&sr=8-1-fkmr0&keywords=anglehead+flashlight+vintage[/quote]

 

What a trip down memory lane - I have four of these mil-spec L-shaped flashlights packed away that I've had for 30 - 40 years. Back in the day, I used them extensively to do inspections using the red filter after my eyes were adjusted to darkness. Per your suggestion, I am ordering a LED replacement bulb for one of them and will put it back into service for nostalgia sake!

We need three things in life: something to do, something to look forward to, and someone to love.