Alien 220 Battery?

[KenD]

All evolv dna 'chips' have input amp limits, meaning the chip will never draw more than xx amount of amps from the batteries.
Each 'chip' has a data sheet that can verify input amp limits.

The dna 250 will never draw more than 28a from the batteries.

Most semi decent regulated devices also have input amp limits though several do not state what they are.

In the Djlsb Vapes test the Alien was able to do a bit over 220w, at least with fully charged batteries. If the device efficiency is at about 90% that would mean an input amp limit of at least 30 amps. Hopefully it has a limit, and one not much higher than that.

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[Don29palms]

I always see alot of talk about watts and amps but there is another factor that are being left out. Resistance.

 

[KenD]

I always see alot of talk about watts and amps but there is another factor that are being left out. Resistance.

How do you mean? Resistance doesn't factor into the amp draw on regulated mods. Overall, coil mass and heat flux matter a lot more (except when we're taking mechs of course).

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[Don29palms]

How do you mean? Resistance doesn't factor into the amp draw on regulated mods. Overall, coil mass and heat flux matter a lot more (except when we're taking mechs of course).

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Resistance is always a factor in the equation.

 

[Vesh]

All evolv dna 'chips' have input amp limits, meaning the chip will never draw more than xx amount of amps from the batteries.
Each 'chip' has a data sheet that can verify input amp limits.

The dna 250 will never draw more than 28a from the batteries.

Most semi decent regulated devices also have input amp limits though several do not state what they are.

Ok, like my presa that tops out at 25 amps, so basically any 26650 or good 18650 can run in it. But it also limites the watts, for example on my cleito 120 i get max 93.75 watts instead of the 100.
I have a dna 40 which is obviously a very simple device i use for temp tootling with nickel, but my coming think vape finder is my first serious dna device being a 250.

 

[Vesh]

I will never recommend exceeding the cdr of batteries. The maximum vaping amps gives a buffer, but you need to remember that the cdr if batteries decreased as they age, and if pushed hard it decreases quicker. Also, you fail to account for the chip inefficiency (unknown value, I calculate with a 90% device efficiency, which might well be too generous). Pulse ratings are inherently dangerous. What if your mod fails and auto fires? The Aspires do indeed seem to perform well, but them being ICR chemistry gives me pause. Not saying that it's necessarily dangerous to use the mod and batteries in the way you exemplify, but when giving advice safety should be the number one concern. And, when there are three- and even four-battery mods available, why take the unnecessary risk? That escapes me.

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i've just used my smok h priv at 160 watts with 2 vtc5a repeatedly and they are not even warm. I feel perfectly safe, and that is above your recommended buffer.
I trust mooch, and there are regulated mod charts now, mooch's formula and his MVA which I trust.
I agree with you for a constant vaper, but someone that takes a puff at 200 and then takes another one 60 seconds later (which is maximum vapes i would do, usually a couple minutes between puffs of that magnitude), i just don't feel the danger, sorry.
Aspire claim they have a mixed chemsitry, the ICR with safety of LIMN. I believe them. Aspire has been the most reliable manufacturer of anyone for me, i have so much of their gear, they only made two POS's, their very first box mod the esp30 and the first revision of pegasus. After that they lifted up their game, have their own battery factory, they are the real deal. They replied to me that they are absolutely certain vaping for 5 second with just a 5 second break is safe for their 1800 mah at FOURTY amps. I believe them. *shrug*.

 

[Vesh]

Resistance is always a factor in the equation.

in what way? In regulated mods, the AMP draw is not affected by resistance. So could you please elaborate? as i didn't believe it at first either, until i read up heavily on it with many experts here, and with Mooch of course, and it all makes sense now. I don't want to get confuse all over again lol!

 

[Don29palms]

Ok. So if the amp draw doesn't matter in a regulated mod then the batteries you use don't matter either.

 

[KenD]

Resistance is always a factor in the equation.

It doesn't factor into the amp draw in regulated mods. Amp draw on mechs and regulated mods is calculated differently. Could you perhaps clarify what you mean? "Resistance is always a factor" could be interpreted in numerous different ways and I'm not sure what exactly you refer to in this context.

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[Vesh]

Ok. So if the amp draw doesn't matter in a regulated mod then the batteries you use don't matter either.

Ok, you are on a different planet to me, i have zero idea what you are on about now, i'll bow out. Thanks.
No one said amp draw doesn't matter, we are saying that the resistance does not determine the amp draw in a regulated mod. In other words, throw the ohms law calculator out the window in this case.. it only has relevance on a mech mod.
In other words, 75 watts at 0.5 ohm will pull the same amps from battery as 75 watts at 0.2 ohm on a regulated mod. Batteries are as important as ever.

 

[Topwater Elvis]

Ok, like my presa that tops out at 25 amps, so basically any 26650 or good 18650 can run in it. But it also limites the watts, for example on my cleito 120 i get max 93.75 watts instead of the 100.
I have a dna 40 which is obviously a very simple device i use for temp tootling with nickel, but my coming think vape finder is my first serious dna device being a 250.

The amps displayed on the screen on the Presa TC 100w and other power devices is output amps (from chip to delivery device) it has absolutely no bearing on amp draw from the battery(s) to the chip (input).

Everyone has to set their own saftey parameters / margins.
Mine are;
50w - max 60w per 20a CDR cell
65w - max 75w per 25a CDR cell
80w - max 90w per 30a CDR cell

There is no single cell I would use at 100w, as batteries are used & age they lose capacity, the harder they're pushed the faster the loss takes place.

 

[Vesh]

sorry, the ijoy 26650 is 100% safe at 100 watts. I am sticking to that. Absolutely, 100%. In fact, you can even see the difference.. i used a brillipower 3500 mah 26650 at 80 watts for a few puffs, got warm, ijoy chaining at 100 watts, cool as a cucumber. Best battery ever.
I've transferred the ijoy to my nebula, and vaped it at 100 watts exclusively (nebula's max), and it's been rock solid. They are the only 26650 i will ever buy again, although hard to come by round these parts.

Thanks very much for the other info regarding amps on screen.

 

[Topwater Elvis]

Sorry, that is your saftey / comfort level.
Like I said, everyone has to set their own.

As batteries are used & age they lose capacity, using any cell near its rated maximum current level causes damage to the cell.
What started life as 30a cdr will not be 30a throughout its useful life.
A cell degrades over time with use, the nearer maximum current / the harder they're pushed the faster it takes place.

 

[Vesh]

it's not a personal comfort level, it's using scientific statistics done by a battery expert.

 

[Topwater Elvis]

You misunderstand or misinterpreted Mooch's results or are focused on mva which on this cell at its mva the voltage drop/sag is nearing horrendous / rendering it close to useless in a regulated power device with a 3.2v low voltage cutoff.

---> iJoy 40A 4200mAh 26650 Bench Test Results...overrated but a great 30A battery!

 

[KenD]

Ok. So if the amp draw doesn't matter in a regulated mod then the batteries you use don't matter either.

Amp draw naturally matters, it's just that the resistance of the coil doesn't determine the amp draw on regulated mods.

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[Vesh]

You misunderstand or misinterpreted Mooch's results or are focused on mva which on this cell at its mva the voltage drop/sag is nearing horrendous / rendering it close to useless in a regulated power device with a 3.2v low voltage cutoff.

---> iJoy 40A 4200mAh 26650 Bench Test Results...overrated but a great 30A battery!

at 100w the nebula pulls 31.25 amps.. and i'm not using it continuously. i'm pulsing. it's vaping perfectly and lasting long too. i'm no where near mva but much closer to cdr.

 

[Vesh]

mooch on ijoy
"I would expect decent cycle life from this cell at 30A continuous"

so pulsing at 31.25 is going to make a difference? i doubt it. let's see, i'll tell y'all years end.