I feel like a noob. More battery questons!

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AttyPops

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There's a combination of things that go into it.

1) the amp rating of the resulting mod is the max-amp rating of a SINGLE battery. So you don't gain amp capacity.
2) Voltage is doubled. That also means that if there's a short, it "goes very bad" very fast as there's twice the "pressure" on the electrons moving through stuff.
3) Battery charge imbalance between the two can result in heating of a battery and failure.
4) twice the failure points to worry about as it's the batteries that vent
5) Mechs are the most worry for these short situations as they have less short-circuit protection...but may have a hot spring and/or fuse added.

I use a stacked battery setup in my box mod. It has a cover that slides off and cannot build up pressure and go 'boom'. I also use protected batteries and a regulated mod...so that's 3 points of safety circuits...one in each battery and one in the voltage regulator. I also have the voltage regulator cut-off matched to the battery capacity (or close) so that the voltage regulator will cut out the mod and not draw much from the batteries beyond their capacity...theoretically.

It's a risk, I suppose. So is using any battery in anything. Just research all the safety concerns, use the safest setup you can find/make. Safer batteries don't vent as violently as standard Li-Ion. We used to recommend protected batteries. Now it's safe chem instead. I'm still using protected in a safe mod...because of the higher energy density. Should probably switch out to IMR.

As a general rule, avoid stacking batteries unless you're fully aware of the risks and have a safe setup and safe batteries. Probably not necessary to stack them at all in most cases. Certain voltage regulators (non-boost) being the exception like in my case.
 
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Charles72deck

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Nov 7, 2014
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When you stack, you have your batteries in a series( plus to minus), meaning your voltage is the sum of the batteries. Parrallel (connecting all plus to all minus) gives sum of all capacity. Google parallel vs series and look at a diagram. You would be doubling voltage, not capacity. Most builds are designed for a certain voltage which you would have doubled.
 
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AttyPops

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Thanks all except Atty Pops. You must reread my post and see that I did not intend on 'using' a stacked battery system in anything; I simply wanted to be educated instead of someone being condescending. Do not reply in that manner as you may turn a potential new vaper away by sounding pompous.

You have me wrong. I read your post and knew that you didn't intend to.
I guess the point is, for you and for others, what purpose would it serve? (It was a rhetorical question)
As to sounding pompous, I don't read it that way at all. Also see post #3...I stack batteries, but under specific circumstances.

What manner did I reply in that offended you? You're reading something into it that is not there. Post #4 was elaborating on the last sentence in post #3...basically the idea is that you don't need to stack because there's other ways of getting the same watts without the stacking dangers. Which was sort of your question.
Simple question, and no, I'm not trying or thinking of trying this. I just want reputable information. so I can educate myself and others. Why exactly can you not stack two 18350 batts in an 18650 mech mod?? Please take it easy on meh. Like I said, I'm not experimenting with this, just curious why???

Basically, you [people] can, but it's less safe and you [people] don't need to do that in a mech, as there are better ways.

Also note that "you" in American English (informally) is often used generically, as in "a someone", not necessarily being YOU personally but rather "a person". At least I often use it that way. :) As in "You can, but why would you want to?" It's really "A person could, but why would anyone want to?" See? You even seem to use it that way in your question. Although the way I phrased it could be misconstrued if you didn't notice my previous post.

I meant it generically, as in "Why would anyone wish to stack batteries in a mech mod?"
In the "old days" people DID stack them. They didn't have RBA's and coil wire around. They used stock coils and high-ohm stuff designed for higher voltage vaping. Now-a-days, we use the single battery approach. Basically, higher-voltage vaping had more "oomph" to it. I used to use 5 volt regulated (fixed voltage) box mods with stacked batteries and 3.0 ohm atomizers, for example. Others, stacked batteries and used, say, 4.x ohm atomizers in unregulated mods.
 
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