stacked 18350

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DaxFX

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Yeah. I stack and it makes the Vamo more efficient is all I can describe. I don't use high anything. Just 7 to 9 watts depending but lowers some when I stack. I earned something though. About pairing. I have a habit of recharging batteries a lot and take them out replace them with already charged ones. This way they never died on me (anymore) because I have no atience with that event so I prevent it. And also I'm never putting freshly charged batteries in. I read somewhere that is not a great idea. That it's better to let them sit a day or two....for get why...something about overcharge. Let me ask, if ths thread is still active, when you pair them do you really need to alternate which one goes in first avk and forth? And if I'm always removing my batteries before death time do I need to pair?

I would say no no metter if you change position or not. But maybe someone will disagree with me, that just a myth.

And let set the battery for a day is not necesary, in fact a freshly hot battery have a higher capacity of discharge and will perform better. In my electric RC heli that need 12 cells LIthium 50v 60c discahrge rate using at 200amps i need to using them freshly hot so the internal resistance (miliohms) will be lower.


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Faylool

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20 minutes. That's easy. Well, I'm a AW battery user. Won't change that and he 18350 button tops don't quite fit the Vamo but I use them anyway. I've never even looked in to if the AW IMR come in flat top. I also use a kick most the time, not with my low reserve 1.7 ohm Pyrex tanks but everything else on my mechanicals. The AW have a reputation for working the best with the kick. I like to get the best out of a device. Stacking the 18350s makes the Vamo as efficient as my Provari.
 

bunnomatic

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Twice as long! Not sir.. Stacked battery equals to serial conection wich double the voltage not the mah rating, by the other way a parallel conection doubles the mah and not the voltage wich is not the case in the VAMO. Stacked 800mah will give you a peak volt of 8.4v wich the nominal voltage will be 7.8v but they still be a rating of 800mah, wich you will have a lot more vaping time with a single 18650. Even triple or more if you go to 2600 and up in the mah (MilliAmp/Hour)
2x 18350 800mah stacked = 7.8v nominal @ .8amp / hour
1x 18650 2000mah = 3.7v nominal @ 2.0amp / hour

You will still have perfect voltage all the way till batteries are dead because the higher volt on stacked. But not more time


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oops. should have typed as compared to a single 18350. I stand corrected
 

DaxFX

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oops. should have typed as compared to a single 18350. I stand corrected

Nop. Stacked 18350 wont double the vape time compared to single 18365. As i explain befor. Is a serial conection not a parallel conection. You will double the voltage with same mAh rating.


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utenzil

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If you don't mind me asking, why are you stacking? It's probably not something one should be doing as a "noob".

There is really no need to be running stacked unless you are really pushing the limits on a DC carto or Vaping over 11-12 watts.

The Vamo V3 that I bought came with two batteries. He may have had the same experience.

My 18350s read "3.7v 900mah" so 7.4V .9A/hr

Btw, the question/thread provided some good info.
 
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donesmokin

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My reasoning for running stacked Efest batteries. I've got a LavaTube V1 (AW18650) and the vape drops off around 3.6/3.7 volts. To me that's the battery output sagging so I figured the Vamo would do the same in 18650 mode. Also I have some 2.5 ohm dual coil cartos (two 5 ohm coils) that need a lot of power (12.5 watts) for a satisfying vape. I got the Vamo because I wanted a powerhouse that would handle anything I put on it. If I didn't have so many PVs already I'd buy a couple more so I could stack some 650's!:2c:
 

DaxFX

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Here is a good reason for stacking, my last build on a RDA with 4 wicks 3mm silica and 5/6 wraps of 32 khantal endup at 3.2ohm, with a single battery i could not get that huge coil to glow red, i stacked the efest flat top 18350 and now my vamo with the octopus hits veryhard.. Somthing i could not get from my evic.


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Scott_Simpson

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I must misunderstand the electronics in the Vamo ... I thought it was a buck/boost circuit, which—with a single cell outputting a nominal 3.7V—will boost the voltage to about 6V and then chop it down via PWM to the target voltage (e.g., 4.5V). I thought that using stacked 18350s, which will output a nominal 7.4V, would by-pass the boost portion of the circuit and simply buck it down to the target voltage (again, e.g., 4.5V) without using PWM since you are providing more than the requested voltage. Is this not correct?

I've heard, on another forum, that in stacked mode, the circuitry still bucks the voltage down to 6V and then uses PWM to pulse it down to the target voltage. If this is correct, it seems daft. :laugh:
 

DaxFX

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I must misunderstand the electronics in the Vamo ... I thought it was a buck/boost circuit, which—with a single cell outputting a nominal 3.7V—will boost the voltage to about 6V and then chop it down via PWM to the target voltage (e.g., 4.5V). I thought that using stacked 18350s, which will output a nominal 7.4V, would by-pass the boost portion of the circuit and simply buck it down to the target voltage (again, e.g., 4.5V) without using PWM since you are providing more than the requested voltage. Is this not correct?

I've heard, on another forum, that in stacked mode, the circuitry still bucks the voltage down to 6V and then uses PWM to pulse it down to the target voltage. If this is correct, it seems daft. :laugh:

with a single battery on 3.3 ohms the vamo can not go up to 6v take a look on the pbusardo video of the vamo and chart to see. Is easier to bring down voltage from 7.4 to 5v then go from 3.7v to 5v.

That is the reason the vamo accept stacked batteries to get up to 6v.
That is the reason evic does not go up to 6v because no stacked can be used


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zoiDman

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with a single battery on 3.3 ohms the vamo can not go up to 6v take a look on the pbusardo video of the vamo and chart to see. Is easier to bring down voltage from 7.4 to 5v then go from 3.7v to 5v.

That is the reason the vamo accept stacked batteries to get up to 6v.
That is the reason evic does not go up to 6v because no stacked can be used


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Not questioning your Choice of Ohms, but why would a Person prefer a 3.3 ohm Carto/Clero/Atty verses something like a 2.5 ohm?

Seems with Lower Ohms you don't have to push the Volts so Hard?
 

DaxFX

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Not questioning your Choice of Ohms, but why would a Person prefer a 3.3 ohm Carto/Clero/Atty verses something like a 2.5 ohm?

Seems with Lower Ohms you don't have to push the Volts so Hard?

Yes you can quistion that no problem, why 3.3ohm just because is my first succesfull build on my RDA and i didnt know what da heck i was doing, i have lots of knowledge on electronics but non on building coils, :) for sure i would prefer a 1.8 - 2.2 range but 3.3 was what i got.. Is working very well but need lots of power and my vamo can feed that power in fact this 3.3 ohm is getting me more vapor and flavor thatn stock 2.2ohm i was using (premade ones) the only con is that need more time to fully heat the coil i just press the fire buton before take my vamo into my mouth.

That coils is wraping 4x silica 3mm so is huge with a very big coil to wick surface bond.. I kinda liked,

And remember is not a carto or clearo, is a rda for drpping

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zoiDman

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Yes you can quistion that no problem, why 3.3ohm just because is my first succesfull build on my RDA and i didnt know what da heck i was doing, i have lots of knowledge on electronics but non on building coils, :) for sure i would prefer a 1.8 - 2.2 range but 3.3 was what i got.. Is working very well but need lots of power and my vamo can feed that power in fact this 3.3 ohm is getting me more vapor and flavor thatn stock 2.2ohm i was using (premade ones) the only con is that need more time to fully heat the coil i just press the fire buton before take my vamo into my mouth.

That coils is wraping 4x silica 3mm so is huge with a very big coil to wick surface bond.. I kinda liked,

And remember is not a carto or clearo, is a rda for drpping

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Gotcha.

I don't rebuild Coils much but I do know what you are talking about.

What would happen if you went down to the Next Smaller Resistance of NiChrome or Kenthal wire?
 
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DaxFX

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Gotcha.

I don't rebuild Coils much but I do know what you are talking about.

What would happen if you went down to the Next Smaller Resistance of NiChrome or Kenthal wire?

I just try with what i got in hand,, i got 10 feet of khantal and 5 meters of silica for $5 shipped. So thats what i buy.. Next coil i will try with just 3 wick 3mm because that 4 wick coil I madeis very round big and give more length on the wire, take 1 or 2 wraps out and see if i got in the low 2ish ohm range.


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