single D cell torch?

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CarpentryHero
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Yeah I’m hoping for a long runtime 100 lumens or less high and a moonlight mode that runs for years Wink

I’m glad I’m not the only flashlight collector out there, I was beginning to think I was strange.
My name is Kendall and I’m a Flashaholic from western Canada

StorminMatt
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Werner wrote:
Batteries are not made for high current.
If you pull 2A from a D cell it lasts 2 hours until 0.8V are reached. Highly decreasing with more current.

So if you want to drive a LED with 1.5A and the LED has a forward voltage of 3.xV
1.5A*3V=4.5W …..would mean if you have batterie voltage of 1V you will need 4.5A…

So the only way would be to go with rechargeable nimh…and then you could easily just use 2 18650 which are not much bigger but better.

Well, the nice thing about D batteries (at least if you go NiMH) is that you can draw large current for long periods of time with little voltage sag and almost cknstant discharge voltage. For instance, my Tenergy Centuras don’t even get warm when drawing a current of 4A in my ROP light (unless we are talking about the battery closest to the bulb, which gets heated by it). And 10000mAH HSD batteries will last even longer. Of course, the real problem with a high power 1xD light is that it will require some pretty hefty boost circuitry in order to run anything of significant output.

Without lamps, there’d be no light.

CarpentryHero
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I’m glad I’m not the only flashlight collector out there, I was beginning to think I was strange.
My name is Kendall and I’m a Flashaholic from western Canada

spaceboy
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I wonder how much it will cost.

CarpentryHero
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Knowing Lumentop, it’ll be priced like there 1c cell torch, $70-$110 maybe?

I’m glad I’m not the only flashlight collector out there, I was beginning to think I was strange.
My name is Kendall and I’m a Flashaholic from western Canada

CarpentryHero
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Location: Edmonton Alberta Canada

I hope it’s more affordable but I fear it won’t be the $30 light I was hoping for

I’m glad I’m not the only flashlight collector out there, I was beginning to think I was strange.
My name is Kendall and I’m a Flashaholic from western Canada

Pulsar
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yeah i seen that... want that...

bansuri
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Mayor Glenn Welsch: There's a saying in Missouri, if you don't like the weather just wait five minutes. In Blaine, with hard work, I think we can get that down to three or four minutes.

Mikeadoo
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Only single D cell lights I’ve been able to find are the $2 or $3 Eveready flashlights. Says “25 lumen 60 hour runtime” on the package from home depot a few days ago but I really doubt they are 25 lumen. Main reason I bought it was just for power outages and just if I needed just enough light to get around, but brighter than moonlight modes.

I like flashlights!!

Brainsick67
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Lumintop SD4A..look into it…really cheap on Amazon right now..

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