Is it possible to use a battery and get more voltage out of it than what it is rated for? For example, could an 18650 battery be able to put out 6 volts with a variable voltage option?
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Yes, it's called a booster circuit. In a not so technical way, it takes a lower supplied voltage and ramps it up to a higher one. The more recent mods to use this are the Provari and the upcoming eclypse. Of course, the fist pack was doing this over a year and a half ago
No. Wayne just showed me on a prototype REO...the 18650 3.7v battery was at 4.1 volts...then we put it in the mod and checked it under load and it came out to 3.1 volts. Now, in order to get more voltage out of one battery you would need a power booster. Aparently there are only two mods on the market right now that I know of that have this....the Provari and the EQ (formerly known as the Eclipse). VV devices work best with stacked batteries. So setting it up with a pair of 3v batteries and then dialing the VV to about 4.2-4.5 is what he likes. Does this make sense? Mind you, I don't do high voltage vaping nor have I messed around with VV so I'm going off of what I just learned. 
Isn't the new Ego Booster (and the GotVapes LCD Ego VV Battery) supposed to feature a boost circuit as well - max voltage is still only 4.2v though.
Good point, Eddie...I only just heard about them the other day. 
Thank you for pointing that out.
Thank you for pointing that out.
I asked this question because I noticed many VV PVs use stack batteries for 6v vaping. I have been spoiled by the large mah ratings of the 18650. I like having those reserves of power. So I guess I would be drawn to a PV with an 18650 and a power booster for 4.2 to 5v vaping and a lasting battery. I change out my 18650 around 3.85 volts if not sooner. It would be nice to have and 18650 that outputs a constant voltage for a long time.
So my next question is....How much space is needed to have a power booster and VV? How large are these components?
Thanks again.
So my next question is....How much space is needed to have a power booster and VV? How large are these components?
Thanks again.
The main difference between using a boost circuit and a buck circuit (one that uses stacked batteries) is that generally, if you are using a switching power supply circuit for both the buck will give you longer battery life. A boost circuit, which usually is more compact and convenient (because there is only one battery) will have a lower battery life than a buck circuit.
As far as the size is concerned, well, that is a function of your ingenuity with the design. I think we've shown with the eGo Booster, you can make a boost circuit that is pretty small. The only reason its limited to 4.7V output is because that's all you can reasonably expect to get out of an eGo Battery, so the voltage limitation is a limitation of the eGo Battery, not the boost circuit.
As far as the size is concerned, well, that is a function of your ingenuity with the design. I think we've shown with the eGo Booster, you can make a boost circuit that is pretty small. The only reason its limited to 4.7V output is because that's all you can reasonably expect to get out of an eGo Battery, so the voltage limitation is a limitation of the eGo Battery, not the boost circuit.
You would not get nearly the same vape time out of an 18650 if you were to boost it though.
Less the higher you boost it too.
Less the higher you boost it too.
You don't get great vape time out of stacked batts. I bet it comes out close to the same for similar battery size.
Before I say anything, I have to admit I know next to nothing about batteries, electronics, etc. I am just asking to get information to clear something up for myself.
You have a protected 18650 putting out 2600mah and this has a booster and it is running at 5v. Wouldn't this last considerably longer than stacked 123s of 750mah running just a vv at 5v?
I have no clue how to run the math on this or what the upside and downsides are to each.
You have a protected 18650 putting out 2600mah and this has a booster and it is running at 5v. Wouldn't this last considerably longer than stacked 123s of 750mah running just a vv at 5v?
I have no clue how to run the math on this or what the upside and downsides are to each.
Of course you are right, since the energy density of batteries with similar chemistry is the same, really the number of mAHr you get out of a specific arrangement is really just a function of the overall volume of that particular arrangement.
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