Are the Samsung 25R's safe at .15 ohms using an IPV4?

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Dangerous.

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So I have many VTC4's but would like some extra battery life. I would go the the VTC5's but I can't find them any where I can trust. This brings me to the 25R's. My understanding is that they are 20A continuous battery and pulse at 100A. I know that running at .15 ohms goes past the amp limit but still was wondering if it was safe or not by using a regulated box.
 
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dom qp

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If you're looking to start a fire, there are easier ways using an ipv4.

I've never attempted using a coil that exceeds the safety parameters for a battery (regulated or not) so I can't comment on the rest, unfortunately.

I'd assume it wouldn't fire and you would get some sort of low resistance error flash on your screen.
 

roxynoodle

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Good question. A few weeks ago I saw a post here where a very low amp battery not suitable for vaping vented in an ipv2. It seemed pretty clear the cause was the battery itself rather than the mod failing from the photos.

A Samsung 25r is a much better battery though.

I tend to play it safe, so I would probably either use the Sonys or build higher. Are we talking about a kanthal build or a tc build? If this is ni200 or titanium, I don't think you'll have a problem.
 

Dangerous.

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Good question. A few weeks ago I saw a post here where a very low amp battery not suitable for vaping vented in an ipv2. It seemed pretty clear the cause was the battery itself rather than the mod failing from the photos.

A Samsung 25r is a much better battery though.

I tend to play it safe, so I would probably either use the Sonys or build higher. Are we talking about a kanthal build or a tc build? If this is ni200 or titanium, I don't think you'll have a problem.
Its a twisted Kanthal build.
 

roxynoodle

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And this mod is wired in series, right? Doesn't that mean that 20A would be the max you could pull then in series with a 20A battery?

There are no 40A CDR batteries, so I want to say the mod itself does not impose an addictional restriction (If its in series).

Now if this mod is wired in parallel, two 20A batteries in perfect condition could pull 40A.

I'm just not the best person to answer this question where regulated mods are concerned.
 

nyiddle

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Hang on, the thing nobody seems to be acknowledging is that OP may be referring to a nickel build. Most nickel builds come out sub-.3 ohms. With a TC mod it's never actually applying the full voltage, rather it's kind of "cycling" at lower voltages to prevent the temperature from getting too hot. This also would prevent the full amperage from being applied (I imagine all TC mods have chips that are smart enough to regulate below 20A).

In the case of a Kanthal build (or not nickel) I wouldn't really recommend going below .3 ohms.

Lastly, I posted a thread (a "PSA" of sorts) about IPV4's catching fire because of the onboard charging balance board. It's worth looking into taking that out, if you can.
 
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Monotremata

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But, you aren't taking into account how the chip can boost.

With regulated mods, you need to know their amp limits.

True.. Steam Engine is great for ballparking things, but the 'Ohm's law' calculator would only apply to a mech, and doesnt take into account the extra amps the chip in a regulated mod needs to get it there. Use the Battery Drain calculator they have set to 'regulated', and use the preset for the 25r. Pop in your resistance and your voltage/wattage you want to look at and it will give you a better idea of just how hard youre taxing the battery. Youll see the 'Atomizer' specs, which is what youve got the mod set to voltage/wattage wise to deliver, and right next to that in the 'Battery Drain' box it will show you just how hard your battery is working to achieve those settings. A neat thing about that is you can also play with the 'Battery Voltage' field as well and watch how the draw increases as your battery drops voltage. Steam Engine is your best friend when it comes to safety.
 

dc99

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Heres the sheet straight from YIHI.25a input max, 35a output max but you have to remember the batteries are in series so its the amp limit of one. I use these batteries in mine and never had any trouble but then again I don't vape at 100w. Building that low defeats the purpose of having a regulated mod to start with.
 
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