Attached is the ohms calculator for my current build. It's inside an releaux rx200s with three imren 3500mah batteries. I'm wondering if this is a safe vape.
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Just wondering your thoughts on this build.
- Thread starter Gwynbleidd
- Start date
It's safe... 3 batteries can handle that ohm load..
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In series you have to build higher not lower...... 1.0 ohm and above..
If it's a regulated mod in series it really doesn't matter because you can adjust wattage or voltage....
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On a regulated mod your resistance doesn't affect amp draw from the batteries, wattage does. The batteries are connected to the regulator, they supply their full voltage and the regulator does some science(magic) stuff and supplies the appropriate amount of current to the coils. If you'd rather not take my word for it, do a google search for calculating amp draw on a regulated mod. Basically, yes your coils are perfectly safe. I think the RX draws something like 23 amps at 200 watts(too lazy to calculate), so any decent 20 amp batteries should be just fine anywhere up to that regardless of your coils.
Edit: I'm not familiar with the batteries you mentioned, you may want look around and see if Mooch has tested those particular ones. The advertised ratings are rarely accurate.
From a quick google, it appears the Imren 3500MAH batteries are a 10A battery! https://www.reddit.com/r/electronic...the_green_30a_3500mah_imren_is_a_10a_battery/
However, at 85W on a regulated mod, as @Chokeslam mentioned, the resistance does not affect amp load on your batteries- wattage does.
The easiest way to calculate is using the cutoff voltage of your mod, so in the RX200's case 9.6V.
You take your set wattage, so in your case, 85W, and divide by input voltage at cutoff-amp load is highest in a regulated mod at the lowest input voltage it works at.
So 85/9.6=8.85A.
I am not 100% sure how efficient the RX200 is, but lets say it is 90% efficient, taking that into consideration you would be pulling at a maximum 9.83A.
EDIT: I should add, you can also calculate the amp load by splitting the batteries, but it is a lot faster to calculate together- the result is the same either way.
However, at 85W on a regulated mod, as @Chokeslam mentioned, the resistance does not affect amp load on your batteries- wattage does.
The easiest way to calculate is using the cutoff voltage of your mod, so in the RX200's case 9.6V.
You take your set wattage, so in your case, 85W, and divide by input voltage at cutoff-amp load is highest in a regulated mod at the lowest input voltage it works at.
So 85/9.6=8.85A.
I am not 100% sure how efficient the RX200 is, but lets say it is 90% efficient, taking that into consideration you would be pulling at a maximum 9.83A.
EDIT: I should add, you can also calculate the amp load by splitting the batteries, but it is a lot faster to calculate together- the result is the same either way.
The formula for both parallel and serial regulated is:
(Used wattage / single battery min voltage / number of batteries)/mod efficiency %
So (85/3.2/3)/90% = 9.837A
So 60W max per battery with 20A batteries
(60/3.2/1)/90% = 20.8A
(120/3.2/2)/90% = 20.8A
(180/3.2/3)/90% = 20.8A
(Used wattage / single battery min voltage / number of batteries)/mod efficiency %
So (85/3.2/3)/90% = 9.837A
So 60W max per battery with 20A batteries
(60/3.2/1)/90% = 20.8A
(120/3.2/2)/90% = 20.8A
(180/3.2/3)/90% = 20.8A
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EDIT: I realise we are explaining the exact same thing lol. I can go a long way about explaining things, this is a much simpler way to explain and I will use it in future.
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Cool thanks yall, the rx200s has an amp readout on the lcd and it was saying 23 amps. So i was a bit concearned.
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With 3 10A batteries anything higher than 93W is outside the safe zone
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The next time you have a spare $30 or so, buy 6 20A cells for your RX and spare yourself some worry. I only buy Samsung, Sony or LG. Believe it or not you can usually get real LG, Samsung, or Sony batteries for less than the re-wrapped mislabled batteries.
Ya, the amps display on regulated mods is essentially useless. It's an ohms law calculation based on the voltage going to the coils, so it's telling you how much current would be drawn from a single power source. You're actually drawing far less. It can be a bit confusing.
That was pretty much what I was going to write in my edited reply, I was using 75W instead of 60 as the example though as most single 18650 mods I see are 75W (Although they don't work at this power for long).
I typed out a pretty long reply, then read correctly what you explained-(Used wattage/Single battery min voltage/number of batteries)/mod efficiency % and realised your way is much simpler than explaining each scenario with a single, dual and triple 18650 mod lol.
I do see the error made a lot though with regulated mods, I think it would be a fantastic idea for a sticky, for people to know what they are actually drawing on their regulated mods? Most of the time with the incorrect calculations I see people thinking they are pulling more amps, but there is the rare occasion it is the other way which could be dangerous.
I realise regulated is far safer, but there is still a potential for issues.
It also helps people understand how high wattages can be safely achieved on multi cell regulated mods. I myself calculated wrong for a long time and could not understand how my batteries never even got warm!
@Chokeslam the on screen readouts do lead to a lot of confusion, and many people assume you are wrong when you explain how to calculate for a regulated mod, as after all, they think why would their mod, and all manufacturers lie to them?
In reality they are not lying, it is just confusing as it is what is going to the atomiser and not the load on the batteries, so I see this error going on for quite a long time unfortunately.
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Think of it as two separate circuits, the chip with the batteries and the chip with the coil.
That is essentially the way I think of it as it makes sense to me this way, for a long time I did calculate wrong though I admit to that.
It may be the long way I go about explaining things, but to someone who still calculates how you would for a mechanical mod with a regulated device, I find it hard to help them understand the amp reading on their mod is what is going to their coil, as after all, I am just a random person to them, while the manufacturers are well known and well regarded to them.
As long as you don't intend to pass 180W your best options would be:
LG HG2
Samsung 30Q
Sony VTC6
Since 30Q is slightly better then HG2 and VTC6 costs double then the other two, I would choose the 30Q.
https://www.e-cigarette-forum.com/f...-vs-samsung-30q-vs-sony-vtc6-shootout.757553/