Are 2x18350 more powerful than 1x18650?

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SlaytheIncubus
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Are 2x18350 more powerful than 1x18650?

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e1000
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If they’re put in series, you get double the voltage

If they’re put in parallel, you get double the amperage

zak.wilson
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What does “more powerful” mean? Able to put out more watts for any significant length of time? No. Able to produce higher output and/or driver failure in some models of flashlight? Sure.

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EasyB
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It really depends on both the exact cells you’re talking about, and the circuit or application the cells are in.

One consideration is the max power that the cells can provide. This is based mostly on the cell’s internal resistance. But typically a circuit or application won’t extract this max power from the cell(s), because of a high LED voltage, for example. This is why you also have to consider the circuit configuration.

texas shooter
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A single 18650 puts out more wattage than 2 two 18350’s. Yes not all batteries are equal but the for top 18650’s we are looking at 10 amp/3500 mah, 15amp/3000 mah, 25 amp/2600 mah, 30 amp/2100 mah. Best 18350 is 10 amp/1100 mah. So not even close.

Lightbringer
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Nope.

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wle
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no

2 18350s in parallel will have lower peak current and power, than any single 18650
2 18350s in any configuration will have lower total energy than any single decent 18650

yes the voltage can be double, sometimes that is required (i have one illegal laser than needs 2 16340s, or 2 CR123As for the voltage) but double voltage is not double power or energy.

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wle
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e1000 wrote:
If they’re put in series, you get double the voltage

If they’re put in parallel, you get double the amperage

however that is usually NOT double the peak amps of any decent single 18650

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SlaytheIncubus
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My original comment/post was deleted without leaving the nuances of the question. Kinda pisses me off. So going to try again. I am NOT selling these or advertising as they are spoken for well before their manufacturing from what I can tell. If you read the stats on the smaller ones near the bottom, when they list ANSI lumens, the 18350 pumps out “more”, but for a “shorter” time. Excuse my elementary vocabulary on the matter, I am still learning this stuff. This is the link I am talking about and I wish to NOT veer into the prices or quality of these lights, simply the battery question alone is my only desire, because personally, they can afford their own advertising, I think. (here is the site: can we not discuss the manuf, simply the battery issue?: http://lux-rc.com/content/products/flashlights/FL33_EDC/special_offers
1)Why do they list the 18350’s as higher lumen than the 18650’s? Manuf spec’d outputs, like binning, sorta?
2)Would a pair of 18350’s with equal output wired in series (end to end, right?)to a single 18650 be the same?
3)Offer ANY performance benefit whatsoever?
4)Null and void point because the internal electronics have input power limits?
5)I’ve seen members lumen-death-tests-of-LED’s on here. I understand how they “die” with too much power in relation to factory specs. Where do I find the specs for driver boards, because most don’t seem to list any power requirements/outputs, usually just modes.
I apologize for the dumb questions. I HONESTLY have problems with the abstract. Figuring out a problem in front of my eyes, I’m well above average. Imagining the abstract I struggle. GREATLY. Thanks, you guys

EDIT: I just watched a drop test on the XX-XX model and the guy specifically said “there’s only only one cell, not two, so it’s not as bright as it could be….” ? This coincides with their stat sheet claiming higher output with two 18350’s versus a single 18650. Or are they just lying?

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wle
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)Why do they list the 18350’s as higher lumen than the 18650’s? Manuf spec’d outputs, like binning, sorta?

==possibly higher drain [a spec ]

2)Would a pair of 18350’s with equal output wired in series (end to end, right?)to a single 18650 be the same?
==one thing is they have less energy per cubic inch, mostly because there is space wasted with connectors etc
also they would not fit in most lights made for 1 18650

3)Offer ANY performance benefit whatsoever?
==higher drain possibly but actually not likely

-==SOME lights are built for 1 or 2 cells
if so, they MAY be brighter on 2 cells in series,. reason-double the volts

5)I’ve seen members lumen-death-tests-of-LED’s on here. I understand how they “die” with too much power in relation to factory specs. Where do I find the specs for driver boards, because most don’t seem to list any power requirements/outputs, usually just modes.
I apologize for the dumb questions. I HONESTLY have problems with the abstract. Figuring out a problem in front of my eyes, I’m well above average. Imagining the abstract I struggle. GREATLY. Thanks, you guys

EDIT: I just watched a drop test on the XX-XX model and the guy specifically said “there’s only only one cell, not two, so it’s not as bright as it could be….” ? This coincides with their stat sheet claiming higher output with two 18350’s versus a single 18650. Or are they just lying?

==probably a special light built for 1 or 2, volts are higher with 2 definitely

==but you would wonder then, where is the current regulation for that light?

wle

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wle
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2 cell lights have an inherent problem, which is cell balance.
it can cause fires.
under special conditions, unlikely
but still
i never think it is worth it
though i do have 1 2 cell light, but it was cheap and it is a jetbeam [good]
i don;t worry about it
but also i do not use it much

wle

"You never have the wind with you - it's either against you, or you're having a good day."
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DB Custom
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The thing about a light that can take a single 18650 or 2S 18350 is that the driver is bucking output to the driver, so one, the driver is relatively weak (output) in terms of it’s needs to allow a buck scenario from a single cell and two, the buck scenario favors the higher 8.4V set up of two cells, so it can stay in regulation longer (in theory) Because the capacity of the “half cells” is so much less ther is still a problem there when it comes to run time.

I’ve built many a light that originally required a single 18650 that now uses two 18350’s to power a 6V emitter, this can neccessitate modifying the light to accept the longer length of the combined small cells. I always used a linear driver and eeked out what I could from the little cells, it’s fun but of course… short lived.

SlaytheIncubus
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Ok. Makes sense now. Thanks dudes

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wle
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usually 2 cell lights are not worth the trouble
for me at least

i also have a laser that requires 2 16340s, what a pain
it lasts about 2 minutes total
it is illegally powered, somehow way too bright

i found out i could use CR123As on it
they do not have the same peak drain but at least they do not cut off

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸