Best AA Flashlight Between $30-$50

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WalkIntoTheLight
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hank wrote:
Cells in parallel: Nitecore MT22A

I don’t understand the benefit of using cells in parallel in a AA light. I get it with lithium-ion (it’s generally safer), but why with an already-safe chemistry like NiMH? They still need to use a boost-driver (which adds some inefficiency the more you need to boost). Is it just amps? Unless they’re using more than 5 amps, a single Eneloop should do the job. If they want to use 2 (or more) cells, why not put them in series so you get a voltage closer to the forward-voltage of the LED, and use half the amps for less loss due to resistance in all the contacts?

buck91
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drewski wrote:
Has anyone tried sticking an SST-20 in a Tool AA? I don’t know if they come on 14mm mpcbs. I would love a 4000k tool aa though.

Not specifically but I’ve put SST-20 in place of some cold white Nichia as well as XPG2 leds with good results. Don’t see why the Tool would be any different. Worst case, just reflow the SST-20 onto the existing star.

Scallywag
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drewski wrote:
Has anyone tried sticking an SST-20 in a Tool AA? I don’t know if they come on 14mm mpcbs. I would love a 4000k tool aa though.

Standard footprint, just reflow it.

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Watermanchris
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WalkIntoTheLight wrote:
hank wrote:
Cells in parallel: Nitecore MT22A

I don’t understand the benefit of using cells in parallel in a AA light. I get it with lithium-ion (it’s generally safer), but why with an already-safe chemistry like NiMH? They still need to use a boost-driver (which adds some inefficiency the more you need to boost). Is it just amps? Unless they’re using more than 5 amps, a single Eneloop should do the job. If they want to use 2 (or more) cells, why not put them in series so you get a voltage closer to the forward-voltage of the LED, and use half the amps for less loss due to resistance in all the contacts?


It’s just adding capacity and more amps. Lights with parallel batteries can often run on a single cell in a pinch like the LT1.
hank
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Quote:
the benefit of using cells in parallel in a AA light.
Actually “side by side” is what I like; the old incandescent “doorstop wedge” flashlights I remember had the cells wired in series but placed side by side. I don’t know how they’re wired in contemporary flashlights.
WalkIntoTheLight
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Watermanchris wrote:
WalkIntoTheLight wrote:
hank wrote:
Cells in parallel: Nitecore MT22A

I don’t understand the benefit of using cells in parallel in a AA light. I get it with lithium-ion (it’s generally safer), but why with an already-safe chemistry like NiMH? They still need to use a boost-driver (which adds some inefficiency the more you need to boost). Is it just amps? Unless they’re using more than 5 amps, a single Eneloop should do the job. If they want to use 2 (or more) cells, why not put them in series so you get a voltage closer to the forward-voltage of the LED, and use half the amps for less loss due to resistance in all the contacts?


It’s just adding capacity and more amps. Lights with parallel batteries can often run on a single cell in a pinch like the LT1.

That seems inefficient, compared to cells in series. Why double the amps, when you can instead double the voltage? Less amps means less loss to resistance, and higher voltage means a more efficient driver.

hank
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Quote:
the benefit of using cells in parallel in a AA light.
Actually “side by side” is what I like; the old incandescent “doorstop wedge” flashlights I remember had the cells wired in series but placed side by side. I don’t know how they’re wired in contemporary flashlights.

I just bought a NITECORE MT22A to give to an elderly neighbor — it’s handgrip size, comes with a highly findable yellow case, and runs on two AA cells.

Lightbringer
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WalkIntoTheLight wrote:
That seems inefficient, compared to cells in series. Why double the amps, when you can instead double the voltage? Less amps means less loss to resistance, and higher voltage means a more efficient driver.

One problem with any cells in series, whether alkaleaks or NiMH, is that one cell can rapidly go to zero and then be reverse-charged. Probably ruin NiMH, but would definitely cause an alkaleak to crap the bed. There’s always one runt of the litter that’ll go first.

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xevious
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hank wrote:
Quote:
the benefit of using cells in parallel in a AA light.
Actually “side by side” is what I like; the old incandescent “doorstop wedge” flashlights I remember had the cells wired in series but placed side by side. I don’t know how they’re wired in contemporary flashlights.

I just bought a NITECORE MT22A to give to an elderly neighbor — it’s handgrip size, comes with a highly findable yellow case, and runs on two AA cells.

!{width:35%}https://encrypted-tbn2.gstatic.com/shopping?q=tbn:ANd9GcQlAgjizc14_xabul...!

Yes, when I said “parallel” I meant physically, not necessarily circuit wise. Vast majority of 2xAA lights run in series, with sequential orientation.

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