14650/14500 single battery VV MOD

Don't get exited yet! but i am just trying to understand,is it a technical impossibility to make a single battery VV in a 14650 or 14500 battery size?

i would love to own one & at the moment all VV offerings are just using 18s size batteries.

my thought was that the module is just that big that it must have that size tube, but does it have to be that big?

I see a lot of advantages for a small mod like that without having to put out with unregulated 3.7 volts.

If anyone has a clue please share with us.

 

Quite simply, battery life. To run a booster circuit, you often need high current capabilities. An IMR of that size will net you about 700-900mAh which would be used up in an hour or two.

 

Yup.. What Madbunny said.. it's certainly possible with a booster but yer.. you're going to sacrifice vape-time.. and not just a little.. most of these boosters aren't very efficient unless you get expensive ones and that kinda defeats the point as well.

 

that will be enough for me for going out, i would say a bit longer then 2 hours

 

regardless to battery life or price i would own one if it was available.
vape time is relative so 2 to three hours will be ok for going out. + the spare battery will be very small.

 

14500 batts are shit. Half an hour or proper function befOre significant drop in performance

 

i had them on a 3.7 volt mod before & they are not great but i wouldn't go as far as "they are shit".

 

It is possible.
I built one of Breaktru's .44 mini booster box mods. It uses a 14500 in a 2xAA box.
Trustfire flames work fine. With low to moderate vaping at 4.2V it would last 7-8 hours.
The booster held the voltage until the battery protection circuit kicked in.

http://breaktru.com/smf/index.php/topic,215.0.html

or

http://forums.canukvapers.com/moddi...us-mini-booster-box-mod-variable-voltage.html

 

There is still hope!

 

No offense to you but "last 7-8 hours" is frankly a pipe dream for an average vaper.

Those TrustFire flames are only about 700 true mAh (I'm being generous) and the booster itself, especially with a diode installed, is only about ~85% efficient.

Quality vaping, staying above 3.2 loaded/vaping volts, with a straight 14500 mod is about a 2ml of liquid affair (if that), so I guess if someone is a 2ml a day vaper maybe 6 hours is doable.

Let's also look at the current demands of the boost technology. At the TI booster's native 5V a 2.5Ω atty needs 2A for 10W. But how does that work when boosting volts? To get 10W out a cell @ 4V it needs to provide 2.5A. As the cell drops it will need to provide more and more amps to maintain that 10W. At 3.5V it's 2.8A, at 3V it's a whopping 3.3A. Standard 14500s are not made for such intense amp loads. A IMR14500 can handle the load, but as you can see from my calculations it's being drained at a rapid rate. A good example would gas mileage, would 10 gallons of fuel take you as far if you were driving uphill the whole time, compared to a level road?

Note those are just theoretical numbers using Ohm's Law and don't take into account the effect of the additional ~15% efficiency loss.

besure said it best.

 

That sounds llike the analogy I made up for ecf aaaages ago .. nice one.
totally agree with the usage amounts, I simply equate mAh to ml's vaped nowadaya, I would love to see it documented with different attys, different mods and different voltages. At the end of the day ( literally for once, I hate that saying) thats the number that will matter.
I reckon 4ml a day for 3000mAh for the line atty at the moment, not the most efficient device due to waste heat into the body. Still, 4ml from a 14500 is dreaming surely.

 

Sometimes I think we don't even know what our actual usage is, it's just a guess. With cartos it's even weirder sometimes. I like these for quick trips and a few hours at the bar.



Bigger carto means more liquid, but it also means more filler that retains more liquid. Of the ~4ml they almost take how much is is vapeable before needing to top off. 3ml? I think less, seems a little over two is right to avoid dry hits/burning.

I've been playing with these lately.



Damn it seems like I go through a lot of juice, but I do know exactly the amount. But I think these are in fact juice hungry things. Pretty decent BTW.

But I'm pretty used to consistent volts as a long time PT and regulated mod user. If I'm siting around the house using 18650's, I'll swap them out at least three times in the course of a day. I like to keep the volts up. There are usually at ~3.8V after a rest when pulled.

Oh well.

 

No offense taken. Not questioning your analysis, I'm only going on the results I saw.
By not including the diode in the circuit and not towing a caravan (in reference to your mileage analogy),
I was seeing 7-8 hours of use. YMMV.

 

Where do I get one of those volt meters from?...also the copper tube mods in the background look sweet

 

The GG P&P is a 14500 vv mod should get on it.

 

the pp will be a 3.7 volt mod with regulated output to 3.6 volts.

 

I have read something about vv for it.

 

no,not now. Imeo still trying to get a vv drop in module for the GGTS but even that proves a bit hard to do.

 

Vaprlife is releasing a very small VV mod that uses a rechargable 9V battery. The unit uses PWM and they are claiming 16+ hours or something on a single battery charge...

V9 From Vaprlife.MOV - YouTube

 

That looks very promising Zain