Battery Configurations in Regulated Mods

[Necroticx]

So as the subject states, I am curious about how a regulated mod, lets say the RX300 is configured battery-wise. It's regulated max is 9.9v and 50a which makes me wonder. Obviously at 9.9v there must be some sort of hybrid parallel series configuration. Perhaps 2 series and 2 parallel. But even then, two in series only gives us a max of 8.4v. Is there some sort of amplifying effect? Or perhaps something I don't understand. Now please bare in mind I am not an electrical engineer or electrician of any sort, I am just a hobbyist, 4 months into vaping, didn't even know Ohm's Law 4 months ago. But I read, research, build coils safely, and most of all try to understand. So you're not replying to an idiot, just to someone who doesn't know the information needed to answer the question.

I would definitely appreciate any thoughts, but I would prefer facts from knowledgeable individuals and if you get super technical on me I will likely ask more questions.

 

[KenD]

So as the subject states, I am curious about how a regulated mod, lets say the RX300 is configured battery-wise. It's regulated max is 9.9v and 50a which makes me wonder. Obviously at 9.9v there must be some sort of hybrid parallel series configuration. Perhaps 2 series and 2 parallel. But even then, two in series only gives us a max of 8.4v. Is there some sort of amplifying effect? Or perhaps something I don't understand. Now please bare in mind I am not an electrical engineer or electrician of any sort, I am just a hobbyist, 4 months into vaping, didn't even know Ohm's Law 4 months ago. But I read, research, build coils safely, and most of all try to understand. So you're replying to an idiot, just to someone who doesn't know the information needed to answer the question.

I would definitely appreciate any thoughts, but I would prefer facts from knowledgeable individuals and if you get super technical on me I will likely ask more questions.

Almost all multiple-battery mods are series and I suspect that that's the case with the rx300 as well. All series I mean. Bucking the voltage is more efficient than boosting, and having good bucking circuitry is pivotal with the low resistance of tc builds. Having about 12v available even at the lowest charge means that most issues with voltage drop are eliminated even if shooting the full 9.9v at the coil.

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[Necroticx]

Almost all multiple-battery mods are series and I suspect that that's the case with the rx300 as well. All series I mean. Bucking the voltage is more efficient than boosting, and having good bucking circuitry is pivotal with the low resistance of tc builds. Having about 12v available even at the lowest charge means that most issues with voltage drop are eliminated even if shooting the full 9.9v at the coil.

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Ok, I understand that, and perhaps I remain somewhat confused, but series configurations allow for maximum voltage (obviously being regulated by the board down to 9.9) but then this calls for a single cell's worth of amperage as our limit. I almost find it hard to believe that they would set that up in that fashion. Seeing as how the RX300 has a 50a regulated maximum, they couldn't expect one 18650 to push 50a. I almost feel like there's some sort of complex circuit here. I could be wrong, or be missing pivotal info.

 

[KenD]

Ok, I understand that, and perhaps I remain somewhat confused, but series configurations allow for maximum voltage (obviously being regulated by the board down to 9.9) but then this calls for a single cell's worth of amperage as our limit. I almost find it hard to believe that they would set that up in that fashion. Seeing as how the RX300 has a 50a regulated maximum, they couldn't expect one 18650 to push 50a. I almost feel like there's some sort of complex circuit here. I could be wrong, or be missing pivotal info.

With series configurations you have more voltage available, which means less amps drawn from each individual battery. Example (four batteries, mod set to 120w, calculated with a battery cutoff at 3v. Note that I don't take the chip inefficiency in count here):

Parallel:
120w / 3v = 40 amps. This is divided between the four batteries so you'll draw about 10 amps per battery

Series:
120w / 12v = 10 amps. This is per battery

As you can see, the amp draw (and therefore also the battery runtime) is (theoretically) identical.

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[Necroticx]

With series configurations you have more voltage available, which means less amps drawn from each individual battery. Example (four batteries, mod set to 120w, calculated with a battery cutoff at 3v. Note that I don't take the chip inefficiency in count here):

Parallel:
120w / 3v = 40 amps. This is divided between the four batteries so you'll draw about 10 amps per battery

Series:
120w / 12v = 10 amps. This is per battery

As you can see, the amp draw (and therefore also the battery runtime) is (theoretically) identical.

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I'm going to do one of these...

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOH lol

I didn't even think of that.

 

[Necroticx]

So am I to assume the company advertises 50a even though 50 amps will never be within safe limits? I mean where's this magical 18650 that pushes 50amps am I right?

 

[Topwater Elvis]

Lots of folks get confused with marketing hype specs.

50a output.
Output = from chip/regulator/buck boost circuitry/magic gizmo board to delivery device.
The batteries do not directly provide output power to the delivery device.
They provide input to the 'chip'.
Input = from batteries to chip/regulator/buck boost circuitry/magic gizmo board.

When calculating battery amp drain using a regulated power device W/V=A per cell.
At the low voltage cutoff battery amp demand will be highest.

 

[Necroticx]

Lots of folks get confused with marketing hype specs.

50a output.
Output = from chip/regulator/buck boost circuitry/magic gizmo board to delivery device.
The batteries do not directly provide output power to the delivery device.
They provide input to the 'chip'.
Input = from batteries to chip/regulator/buck boost circuitry/magic gizmo board.

When calculating battery amp drain using a regulated power device W/V=A per cell.
At the low voltage cutoff battery amp demand will be highest.

OI! I am such a newb. lol

Ok, but I think I somewhat understand.

 

[Imfallen_Angel]

So as the subject states, I am curious about how a regulated mod, lets say the RX300 is configured battery-wise. It's regulated max is 9.9v and 50a which makes me wonder. Obviously at 9.9v there must be some sort of hybrid parallel series configuration. Perhaps 2 series and 2 parallel. But even then, two in series only gives us a max of 8.4v. Is there some sort of amplifying effect? Or perhaps something I don't understand. Now please bare in mind I am not an electrical engineer or electrician of any sort, I am just a hobbyist, 4 months into vaping, didn't even know Ohm's Law 4 months ago. But I read, research, build coils safely, and most of all try to understand. So you're not replying to an idiot, just to someone who doesn't know the information needed to answer the question.

I would definitely appreciate any thoughts, but I would prefer facts from knowledgeable individuals and if you get super technical on me I will likely ask more questions.

Reach Mooch's info: Calculating battery current for a regulated mod • r/electronic_cigarette

He's the actual local expert on such thing, so never mind the pseudo-crap others might have told you. (But Elvis' comment is fine)

 

[KenD]

So am I to assume the company advertises 50a even though 50 amps will never be within safe limits? I mean where's this magical 18650 that pushes 50amps am I right?

It's likely that it's the output amps. That's unrelated to the input amps, the amp draw at the battery. For example, a .1Ω coil at 5v would give 250w, but provide 50 amps at the atomizer. You would therefore not be able to get more than 250w because the output amp limit had been reached.

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