4aa thrower

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Serifus
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you might want to look into the convoy x3 its a little bit dated, but was 4xaa/26650 with some spacer o rings

bmengineer
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Maybe you need a Nitecore EA81 with an emitter swap.

Find all my reviews of flashlights and more gear at www.bmengineer.com

Marc E
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GreenShrike wrote:
Heh — and here I was hoping for “Sure it’ll fit! 26650’s are usually closer to 27mm and their flashlights usually have at least a mm or two of slop!” I don’t have any 26650 lights to actually measure the inner diameters of, so I don’t know.

Ah, well. Smile

I’d certainly think it would increase the market for 26650 lights if they fitted and were sold with 3xAA adapters. They have a decent “regular flashlight” hand-feel, and you can give them to the same muggles who don’t mind toy 3xAAA (i.e. 18650 in disguise) lights — except without the exceptionally poor runtime and the lack of decent amperage.

Maybe I’ll go put a post to that effect in the Sofirn suggestion thread…


Theory is theory but proof is proof, immediately after replying i did try and shove 3 AAs into my Cometa’s 26650 tube… no chance! I agree, we definitely need a couple of 3xAA lights that can also take a 26650, let me know what Sofirn say Big Smile
Serlite
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GreenShrike wrote:

Heh — and here I was hoping for “Sure it’ll fit! 26650’s are usually closer to 27mm and their flashlights usually have at least a mm or two of slop!” I don’t have any 26650 lights to actually measure the inner diameters of, so I don’t know.

Ah, well. Smile

I’d certainly think it would increase the market for 26650 lights if they fitted and were sold with 3xAA adapters. They have a decent “regular flashlight” hand-feel, and you can give them to the same muggles who don’t mind toy 3xAAA (i.e. 18650 in disguise) lights — except without the exceptionally poor runtime and the lack of decent amperage.

Maybe I’ll go put a post to that effect in the Sofirn suggestion thread…

I think a 26650 light that could fit 3xAA would be a great idea! The same flexibility that a 14500/AA light affords, but with much more usable capacity when running on Li-ion.
(Also, I can confirm that a Sofirn SP33 only has an inner diameter of about 26.5mm, so that one’s off the table too. At minimum, 3xAA squashed together is about a 30mm diameter, so I think that adapter’s dimensions are a little misleading.)

arow55
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bmengineer wrote:
Maybe you need a Nitecore EA81 with an emitter swap.

Can’t do emitter swap. Gonna have to wait for some manufacturer to make what I want.
buck91
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Serifus wrote:
you might want to look into the convoy x3 its a little bit dated, but was 4xaa/26650 with some spacer o rings

I haven’t been able to find one anywhere lately…

Lightbringer
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Wellp, for 4×AA you got the TN4A, TK4A, and SP…something, forgot. Thrunite/Thorfire/Sofirn, respectively, and all essentially the same light.

Dunno why you’d want to use those hateful little AAs, as they’ll take a dump in the light and ruin it, especially with multiple cells in series (2 worse’n 1; 4 worse’n 2).

And output will fall off from the first second they’re powered up.

NiMH is marginally better, won’t leak, but I still wouldn’t want to use 4 in series, as the first “weak link” that drops below 1.2V will almost instantly be reverse-charged and ruined.

So… you pays yer money and you takes yer chances.

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ChrisGarrett
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I’ve got two Sunwayman D40A CW/NW lights and I like them hoth.

Chris

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power911 wrote:

I don’t know what are OP reasons are but if it was me then I’d go with tropical heat safety in my case.
Other than lithium primaries and NiMH batteries, I’ll never leave my 18650 or any li-ion in my car or anywhere potentially hot.
Just toss a powerbank in car or even placing it on garden table outdoors and you’ll get a massive pregnant battery.

A pouch lipo is not the same as a cylindrical li-ion cell.

arow55 wrote:

Yes I live in the southern u.s. Nimh have other advantages too.

There is no problem using cylindrical lithium cells in high temperatures.
You will be dead before there is any risk of a lithium cell exploding.
WalkIntoTheLight
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Lightbringer wrote:
NiMH is marginally better, won’t leak, but I still wouldn’t want to use 4 in series, as the first “weak link” that drops below 1.2V will almost instantly be reverse-charged and ruined.

NiMH is a lot better than alkaleaks, especially for power output. They’re not as good as lithium-ion, but a 1000+ lumen 4xAA light will easily run on NiMH.

Most good 4xAA lights have low-voltage cut-off, so shouldn’t reverse-charge your cells even if you have a weak one. Besides, I’ve reverse-charged Eneloops, and they’re still perfectly fine with no loss of capacity. Probably lost a few cycles, though, so it’s definitely not good for them.

One thing that 4xAA lights have going for them, is that you can find batteries absolutely everywhere. The alkaleaks certainly aren’t good, but it’s better than nothing if you have no other choice.

arow55
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Enderman wrote:
power911 wrote:

I don’t know what are OP reasons are but if it was me then I’d go with tropical heat safety in my case.
Other than lithium primaries and NiMH batteries, I’ll never leave my 18650 or any li-ion in my car or anywhere potentially hot.
Just toss a powerbank in car or even placing it on garden table outdoors and you’ll get a massive pregnant battery.

A pouch lipo is not the same as a cylindrical li-ion cell.

arow55 wrote:

Yes I live in the southern u.s. Nimh have other advantages too.

There is no problem using cylindrical lithium cells in high temperatures.
You will be dead before there is any risk of a lithium cell exploding.

Yes you would be dead in a car here in summer under sun with windows rolled up. But I leave my lights in car in summer. my niece killed her dog leaving it in car a couple hours.
arow55
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WalkIntoTheLight wrote:
Lightbringer wrote:
NiMH is marginally better, won’t leak, but I still wouldn’t want to use 4 in series, as the first “weak link” that drops below 1.2V will almost instantly be reverse-charged and ruined.

NiMH is a lot better than alkaleaks, especially for power output. They’re not as good as lithium-ion, but a 1000+ lumen 4xAA light will easily run on NiMH.

Most good 4xAA lights have low-voltage cut-off, so shouldn’t reverse-charge your cells even if you have a weak one. Besides, I’ve reverse-charged Eneloops, and they’re still perfectly fine with no loss of capacity. Probably lost a few cycles, though, so it’s definitely not good for them.

One thing that 4xAA lights have going for them, is that you can find batteries absolutely everywhere. The alkaleaks certainly aren’t good, but it’s better than nothing if you have no other choice.

How did you reverse charge your eneloops? And how did you know?
Lightbringer
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WalkIntoTheLight wrote:
NiMH is a lot better than alkaleaks, especially for power output. They’re not as good as lithium-ion, but a 1000+ lumen 4xAA light will easily run on NiMH.

Yeh, easily on my TK4As.

WalkIntoTheLight wrote:
Most good 4xAA lights have low-voltage cut-off, so shouldn’t reverse-charge your cells even if you have a weak one. Besides, I’ve reverse-charged Eneloops, and they’re still perfectly fine with no loss of capacity. Probably lost a few cycles, though, so it’s definitely not good for them.

They’re starting off in the hole at 4.8V, and by the time one is spent, that’s a sudden drop to 3.6V. Hopefully that’s be low enough under load that a light that thinks its got alkaleaks would start warning you (as in blinking the light itself or cutting off, not just turning the indicator from yellow to red or something), but you’d have to know the spex of the light itself.

WalkIntoTheLight wrote:
One thing that 4xAA lights have going for them, is that you can find batteries absolutely everywhere. The alkaleaks certainly aren’t good, but it’s better than nothing if you have no other choice.

Marginally, but yeah. Still burning off the Rat Shacks and Rayovacs I unearthed…

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Enderman
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arow55 wrote:

Yes you would be dead in a car here in summer under sun with windows rolled up. But I leave my lights in car in summer. my niece killed her dog leaving it in car a couple hours.

Well that’s a horrible idea to do to any type of battery, not just lithium.
arow55
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Enderman wrote:
arow55 wrote:

Yes you would be dead in a car here in summer under sun with windows rolled up. But I leave my lights in car in summer. my niece killed her dog leaving it in car a couple hours.

Well that’s a horrible idea to do to any type of battery, not just lithium.
So you would advise against keeping emergency flashlight in car in hot climates?
ChrisGarrett
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arow55 wrote:
Enderman wrote:
arow55 wrote:
Yes you would be dead in a car here in summer under sun with windows rolled up. But I leave my lights in car in summer. my niece killed her dog leaving it in car a couple hours.
Well that’s a horrible idea to do to any type of battery, not just lithium.
So you would advise against keeping emergency flashlight in car in hot climates?

Go get some Energizer Ultimate Lithium AAs and use those in hot locations, as they handle temperatures better than most other offerings.

Chris
Lightbringer
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arow55 wrote:
my niece killed her dog leaving it in car a couple hours.

Urg.

Those people need to be locked inside hot cars with closed windows on sweltering sunny days for the same length of time as the dogs/kids they killed.

Yeah, go’head everybody, send the hatemail…

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Lightbringer
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ChrisGarrett wrote:
arow55 wrote:
So you would advise against keeping emergency flashlight in car in hot climates?
Go get some Energizer Ultimate Lithium AAs and use those in hot locations, as they handle temperatures better than most other offerings.

This.

I’d still keep the cells outside the light, in a baggie or similar, juuuust in case.

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WalkIntoTheLight
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arow55 wrote:
How did you reverse charge your eneloops? And how did you know?

The most recent time was…

I have a temperature console that takes 4 AA’s. I was using four Eneloops in them, and one must have been a bit weak or maybe I didn’t fully charge it. When I noticed the console wasn’t working (it was probably dead for a few days), I took out the cells and measured their voltage with my DMM.

Most of the cells were down around 0.8v. However, one of the cells measured about -0.7v. It had been reverse charged.

I couldn’t recharge it in any smart charger, since the charger would reject it as being put in the wrong way. So I used a dumb charger, which just forces current into a cell no matter which way around you place it. After a few minutes of that, its polarity was restored, and I then could charge it using a regular charger. It charged up fine, and discharge capacity testing indicates it didn’t lose any capacity.

It probably lost some cycles, though. Reverse charging isn’t good.

Lightbringer
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They could’ve all been reasonably well-matched, in that the other 3 were certainly dead, but not reverse-charged/-ing.

Worst case is if the other 3 were still happily pushing out 1.2V at however many amps, and force-feeding the runt of the litter the wrong-way. That’s when you fry ‘em but good.

Did that with NiCd cells one time, and one vented. Slow hiss, nothing dramatic, but it still stunk.

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WalkIntoTheLight
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Yeah, they weren’t badly un-matched. One was just a little weaker (less capacity) than the other 3. They were all in series. So, the 3 “good” ones were still happily pushing out 0.8v x 3 = 2.4v. The 1 weak cell was reversed at -0.7v. So, the battery was still providing 2.4v – 0.7v = 1.7v in total. So, it was still reverse-charging the weak cell when I discovered it.

Below 0.9v there’s almost no capacity left in Eneloops. So, it doesn’t take much of a mis-match for a reverse-charge scenario to happen when you drain a multi-cell battery. It probably wouldn’t have happened in a 2-cell series battery. Much easier in a 4-cell series battery.

Hugh Johnson
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WalkIntoTheLight wrote:
Lightbringer wrote:
NiMH is marginally better, won’t leak, but I still wouldn’t want to use 4 in series, as the first “weak link” that drops below 1.2V will almost instantly be reverse-charged and ruined.

NiMH is a lot better than alkaleaks, especially for power output. They’re not as good as lithium-ion, but a 1000+ lumen 4xAA light will easily run on NiMH.

Most good 4xAA lights have low-voltage cut-off, so shouldn’t reverse-charge your cells even if you have a weak one. Besides, I’ve reverse-charged Eneloops, and they’re still perfectly fine with no loss of capacity. Probably lost a few cycles, though, so it’s definitely not good for them.

One thing that 4xAA lights have going for them, is that you can find batteries absolutely everywhere. The alkaleaks certainly aren’t good, but it’s better than nothing if you have no other choice.

My 4xaa TN4A drained alkaline in 10-15 minutes. Nimh lasts nearly an hour.

buck91
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ChrisGarrett wrote:
arow55 wrote:
Enderman wrote:
arow55 wrote:
Yes you would be dead in a car here in summer under sun with windows rolled up. But I leave my lights in car in summer. my niece killed her dog leaving it in car a couple hours.
Well that’s a horrible idea to do to any type of battery, not just lithium.
So you would advise against keeping emergency flashlight in car in hot climates?

Go get some Energizer Ultimate Lithium AAs and use those in hot locations, as they handle temperatures better than most other offerings.

Chris

And thats exactly my draw to a multiple AA format. Specifically my 5.11 A6 in my truck. So far its been the perfect truck light (although I would like a better color tint and higher CRI than the old XML produces). Similar, though less reliable, is the Coast HP14 in my wife’s truck.

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