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This or the 3000 35A?
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#1 (permalink)      12/29/2018 9:08:03 AM US Central   quote/reply + tips
Telmo
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This or the 3000 35A?
What is the best option for a e-cig? This one with 4000mAh 30A or the 3000mAh 35A?
I want to use it for my squonk mod with a Profile RDA.
#2 (permalink)      12/29/2018 9:29:33 AM US Central   quote/reply + tips
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vitrolles
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Watts / Volts / Amps / Ohms calculator


Edited on 12/29/2018 at 9:49 AM. Reason:
#3 (permalink)      12/29/2018 2:00:25 PM US Central   quote/reply + tips
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patrico1112
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https://www.e-cigarette-forum.com/attachments/914a051b-39dc-4d36-a733-769e44c5c9f9-jpeg.788237/

Mooch ratings

Looks like this one is 25-30 amps and should be fine with profile lower amps but 1000 more mahs.

Edited on 12/29/2018 at 2:07 PM. Reason:
#4 (permalink)      12/29/2018 3:54:13 PM US Central   quote/reply + tips
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digitally_vaporized
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Check the mooch links. IIRC, at 30 amps discharge the 30Ts will last longer than the 40Ts

@patrico, fixed the 1st link: https://www.e-cigarette-forum.com/attachments/914a051b-39dc-4d36-a733-769e44c5c9f9-jpeg.788237/
#5 (permalink)      12/29/2018 5:47:58 PM US Central   quote/reply + tips
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Both are great batteries, each with its own advantages depending on your build and desired power level.

If you need more than 25A consistently, the 30T is probably better for you. If you were never satisfied with the power output of a single 18650 mod, expecting 60W+ normally, this may be what you need in a single-cell 21700 mod.

If your usage is usually 25A or less and would like more life out of a charge, the 40T is probably best.

I have both and use the 40Ts most because it fits the way I vape most (0.4 ohm, 3.8V/35W). At that usage it's never strained (doesn't even get warm) yet it runs for a full squonk bottle of juice.

I would use a 30T for a really low-ohm build at much higher W/V even if the 40T were technically capable of it under strain. Putting batteries under strain shortens their lifespan and they won't deliver the current (A) that you want as their charge level (V) drops.

That's how I see it anyway. No doubt others will disagree. They often do...

Edited on 12/29/2018 at 9:46 PM. Reason:
#6 (permalink)      12/29/2018 5:50:23 PM US Central   quote/reply + tips
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patrico1112
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@digitally_vaporized. Thanks I gave up on getting that one to work. I think the script enhancer was messing it up.
#7 (permalink)      12/30/2018 3:29:51 AM US Central   quote/reply + tips
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analogueman
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Pretty much what Randall_H says above. It all depends on how you vape.

If you're an MTL Vaper, on something like a one oHm coil and vaping at relatively low watts, the 40T is a great battery (assuming it's a genuine Samsung of course).

However, if you sub-ohm at higher watts, then the higher amp 30T would suit you better.

Take me as an example - I vape on 1.2 oHm coils exclusively at 30 watts (6 volts), which means I pull no more than 5 amps. Therefore, I use a combination of Samsung 40T and 50E 21700 cells. Even the 10amp 50E gives me 100% amperage overhead, which is safe and doesn't overstress the battery.
It's twelve inches long, but don't use it as a rule...
#8 (permalink)      12/30/2018 4:38:45 AM US Central   quote/reply + tips
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digitally_vaporized
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analogueman wrote:

Take me as an example - I vape on 1.2 oHm coils exclusively at 30 watts (6 volts), which means I pull no more than 5 amps. Therefore, I use a combination of Samsung 40T and 50E 21700 cells. Even the 10amp 50E gives me 100% amperage overhead, which is safe and doesn't overstress the battery.


6 volts? That's a regulated device then, isn't it? Assuming the device's battery cut-off is at 3.2V, you're pulling around 10 amps from that battery when its voltage is low.

#9 (permalink)      12/30/2018 5:29:42 AM US Central   quote/reply + tips
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digitally_vaporized
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Randall_H wrote:

No doubt others will disagree. They often do...

I agree with you! I especially liked the part where you said that for above 60W, single-cell vaping the 30T is probably a better choice. As analogueman just exemplified, many people calculate their amp needs incorrectly, so using a wattage cut-off is a better pedagogy. At 60W the battery will deliver ~22amps, so it's right around the point where a 30T is the better choice due to lower internal resistance/lower operating temperature.

#10 (permalink)      12/30/2018 5:57:45 AM US Central   quote/reply + tips
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analogueman
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digitally_vaporized wrote:

6 volts? That's a regulated device then, isn't it? Assuming the device's battery cut-off is at 3.2V, you're pulling around 10 amps from that battery when its voltage is low.


Indeed, regulated. But I rarely vape my batteries below a charge of approx 3.9 volts.

It's a relevant point you make though, and something not widely mentioned when the whole topic of battery safety regularly rears it's head. And that's on regulated mods (NOT mech), the amps pulled from a battery actually rises as the battery voltage falls. So the amps yanked from a cell when it's fully charged at 4.2 volts is somewhat lower than at the point a mod will cut off (say, 3.2 volts). It's certainly something Vapers often overlook (or aren't even aware of) when considering their battery purchase. :-)


digitally_vaporized wrote:

As analogueman just exemplified, many people calculate their amp needs incorrectly...


No I don't chap. The only error is your assumption. What I said was merely general.


Edited on 12/30/2018 at 6:31 AM. Reason: Typo
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#11 (permalink)      12/30/2018 6:31:28 AM US Central   quote/reply + tips
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digitally_vaporized
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analogueman wrote:

It's a relevant point you make though


It is, because even at 4.2 volts you are still pulling way above 5 amps @30 watts and your 10A battery isn't anywhere close to giving you your claimed 100% overhead.

Also, the highly unusual practice of changing batteries at an unloaded voltage of 3.9 is information you didn't seem fit to include in your previous post, a post that said "Take me as an example"? If given the choice, I tend to choose "ignorance" over "maliciousness" as an explanatory model, but since you apparently knew that running a battery down to 3.2V will result in a higher than 10 amps discharge for 30 watts of power, one is left to wonder what made you declare a 10A cell perfectly fit for 30W vaping.

analogueman wrote:

It's certainly something Vapers often overlook (or aren't even aware of) when considering their battery purchase. :-)

And your obfuscating the matter isn't helping.