Mods with Voltmeters?
- Thread starter Monkey Arms
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To display battery or voltage to the atty/carto?
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Mass production tube-style mods with led readouts of volts, atomizer ohms, and battery voltage, or some combination thereof: Smoktech VMax, ProVape Provari V2, Lavatube (I think), Buzz Pro II (I think).
There are also probably a few more production mods with it, and hundreds if not thousands of home-made or limited production mods that do it.
I love VV, and I love the VMax. The ProVari is second-best (and very, very good) because of its 3.5 amp limitation to the VMax's 5 - and a couple of other things. VMax starts with 7.4 volts (8.5 v with fully charged batteries, to the ProVari's 3.7/4.25. Don't want to start any fights, just expressing my opinion, along with a couple of facts.
The Darwin has to get mentioned as the only mass (well, semi-mass) production mod that uses variable wattage instead of variable voltage - a distinct advantage. Not sure if they have an enforceable patent, but if not, I expect to see the mainstream vv mods offering VV and VW in the same device. Looking forward to it actually.
http://www.e-cigarette-forum.com/fo...385-new-variable-voltage-device-smoktech.html
There are also probably a few more production mods with it, and hundreds if not thousands of home-made or limited production mods that do it.
I love VV, and I love the VMax. The ProVari is second-best (and very, very good) because of its 3.5 amp limitation to the VMax's 5 - and a couple of other things. VMax starts with 7.4 volts (8.5 v with fully charged batteries, to the ProVari's 3.7/4.25. Don't want to start any fights, just expressing my opinion, along with a couple of facts.
The Darwin has to get mentioned as the only mass (well, semi-mass) production mod that uses variable wattage instead of variable voltage - a distinct advantage. Not sure if they have an enforceable patent, but if not, I expect to see the mainstream vv mods offering VV and VW in the same device. Looking forward to it actually.
http://www.e-cigarette-forum.com/fo...385-new-variable-voltage-device-smoktech.html
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The buzz pro doesn't have any sort of LED readout, only an adjustment knob for voltage. The lavatube displays set voltage, and battery voltage, but not until just recently were models made that could check atomizer ohm.
Also, the batteries the provaris use shouldn't come off the charger any higher than 4.20v. Aside from the higher amount of amperage to work with on the vmax, I guess I'm unclear on why you say the provari is second best? Comparing the nominal voltages of batteries (3.7-7.4) used in two different kind of mods doesn't seem to mean much, were you just saying the vmax is better due to the higher amp limit?
And the Darwin (variable wattage) displays the following each time you press the fire button:
Wattage
Voltage
Amperage
Ohm's
Battery level
Wattage
Voltage
Amperage
Ohm's
Battery level
Is this really necessary in a thread asking about voltmeters?
Hi knives, thanks for the info on the BP and LT. Wasn't sure about them, never used either.
Yeah, I just think the VMax has a little edge because of the higher amp limit and the inherent advantage (IMO) of having 2 x (nominal) 3.7v to work with. Not an EE, but I just have a gut feeling that besides the slightly higher raw amp capacity that (2 x 18350) has over (1 x 18490/18650), that higher voltage stepped down will just allow electrons to flow better than 3.7 v stepped up.
Again, just a gut feeling with not too much science that I can readily refer to to back it up, other than what I gathered from the VMax thread that VAPNJ350 contributed to. I'll see if I can get a better explanation from him that's more scientific than my half-assed gut feeling, and maybe even discover that I'm totally off base.
At any rate, the higher amp limit is not completely trivial for me. A friend of mine ordered the V2 the same day I ordered my VMax, and we compared them the other day. It was just off-putting that my first experience with it was an error code when trying to run a 1.5ohm dual coil carto, but I fully realize that its design is for the higher resistances that in my understanding give you better flavor/performance anyway. It's probably a little bit like being disappointed that a Formula 1 car won't pull my heavy equipment trailer, but it's just nice to be able to fire whatever attachment I want with the VMax. I still love the ProVari, and will get one when I can, for a wide variety of reasons, not the least of which is to give props to the people who created such a nice device that Smoktech felt compelled to clone it. And also to "buy American", which is exactly why my friend went with the ProVari. I've vowed to help atone for the sin of supporting the Chinese by doing the same as soon as I can.
And thanks for the recommendation that Li batteries get charged no higher than 4.20 or so; I do believe I've seen that said before. The AW IMR 18350's come off of a Trustfire TR-001 at 4.25-4.26 volts, so I think I'll move up its retirement date. I like the "slow charge" feature of the better chargers anyway, as well as the 4- six- or 8-at a time thing. Gonna stop using alkaline AA's in everything, and go to Li 14500's.
Thx again for the info.
***
And yes, I could have restricted my comments to a mere list of the mods that have voltage displays, but I didn't. Sorry about that, but at least the mods in question do have voltage readouts. I will readily agree though that the thread is not entitled "Opinions wanted on relative merits of VMax vs. ProVari". Hope there are no hard feelings; I don't want to venture into "fan boy" territory any more than I might already have.
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Sorry but, yeah. 2x18350 connected in series does not equal double the capacity. You're pretty much getting one 7,4V nominal (8,4V max) battery with 700mAh (NOT 1400 mAh).
The efficiency of VMax regulator is unknown (or actually, I don't know it; someone does probably).
But as someone said already, comparing the device that requires two batteries, to a device that requires one battery is a bit... apples and oranges. I'll always prefer the device that requires only one battery, for multiple reasons: security (not just for having stacked batteries, but also always looking out you're using an actual pair in the same condition), SIZE (big one; you'll never have vmax in "mini" version), and the fact that... I need just one battery; less hassle all around).
Of course booster has its drawbacks, like higher current drain from the battery on higher voltages, but for our purposes, I consider it a superior solution.
"Again, just a gut feeling with not too much science that I can readily refer to to back it up, other than what I gathered from the VMax thread that VAPNJ350 contributed to. I'll see if I can get a better explanation from him that's more scientific than my half-assed gut feeling, and maybe even discover that I'm totally off base." ....
Or not. (Maybe I should stop being so charitable).
I have to believe that two 18350 batteries have significantly more capacity than one 18490 battery, however you want to slice it, and maybe a much slighter capacity advantage over one 18650. It seems to me that 700mah at 7.4 volts will yield a lot more electron flow than 700mah at 3.7 volts, and that you might have been a little hasty in your effort to make me appear uninformed. That 700mah at 7.4 volts will be able to provide a larger, longer-lasting supply of current at 3.0 to 6.0 volts than a 3.7 volt battery with the same amp/hour rating.
I'm happy for you that you have a device that you like, with the number of batteries that you prefer, and I was not "comparing" the two devices so much as "contrasting" them, with the full knowledge that an apple is an apple, and an orange is an orange; although the orange is much more "orangey".
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Oh well, started typing and then realized that I'm getting far more into electronics than most people would like to read, but it pretty much all boils down to what I already wrote, so... I'm happy you're happy with your VMax.
Oh go on, you're among friends here; and I'd like to learn about this stuff, so if you can explain how 7.4 volts/700mah isn't more total energy than 3.7 volts/700mah, it would be very edifying for me.
Well now, there's lots of words being used, and all of them have different meaning. With my first post I was trying to point that total capacity stays the same when 2 batteries are used in series.
Usage time, which you seem to try to address, includes a lot more parameters than just number of batteries connected, one of which would be efficiency of the Wmax step down electronic at usable voltage. The other would be the draining curve of 2x18350 at different amper rating and cut-off point. Basically, it gets a bit more complicated than just adding up two numbers written on the battery and concluding that 2x18350 > 1x18650.
I did try to point out that those two devices are very different, so from the start comparison (or contrast, though I do not see the difference here, maybe its just me) is a bit missed.
Usage time, which you seem to try to address, includes a lot more parameters than just number of batteries connected, one of which would be efficiency of the Wmax step down electronic at usable voltage. The other would be the draining curve of 2x18350 at different amper rating and cut-off point. Basically, it gets a bit more complicated than just adding up two numbers written on the battery and concluding that 2x18350 > 1x18650.
I did try to point out that those two devices are very different, so from the start comparison (or contrast, though I do not see the difference here, maybe its just me) is a bit missed.
"With my first post I was trying to point that total capacity stays the same when 2 batteries are used in series".
And that is where you are completely wrong, if you will pardon my stating the obvious. There's no need (IMO) to bring in additional variables like switch efficiencies, devices, or anything else.
"Sorry but, yeah. 2x18350 connected in series does not equal double the capacity is simply not accurate.
If, as is the case in your example, the amperage/hour ratings are the same, two such batteries would have twice the "capacity" of one in all but the most unusual of interpretations of the word "capacity".
700 mah at 7.4 volts = 5,180 milliwatt/hours = 5.180 watts for one hour.
700 mah at 3.7 volts = 2,590 milliwatt/hours = 2.590 watts for one hour.
"maybe its just me" I think it is just you. Can you just say "OK, I was a little hasty, said something that doesn't really hold up, and I guess you're pretty much correct"? I'd have a lot of admiration for you if you could do that.
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Oh, I'm among friends here. Amazing atmosphere to pick out words from sentences Yes, total energy of 2 cells is double of energy of 1 cell. And there you go saying "700 mAh at 7.4V". That 700 is what is usually referred to as capacity (or what I was referring to). Its total voltage that would double, having more total energy.
Though the thing I was trying to pass out here (the reason why I was indeed mentioning efficiency of electronic and drain curve) is to point out to unknown usage time, which is not something you calculate by adding numbers.
I was a little hasty, and got drawn into a discussion that I don't care that much about.
Yes, total energy of 2 cells is double of energy of 1 cell. And there you go saying "700 mAh at 7.4V". That 700 is what is usually referred to as capacity (or what I was referring to). Its total voltage that would double, having more total energy.Though the thing I was trying to pass out here (the reason why I was indeed mentioning efficiency of electronic and drain curve) is to point out to unknown usage time, which is not something you calculate by adding numbers.
I was a little hasty, and got drawn into a discussion that I don't care that much about.
John, I'm also certainly not super knowledgable when it comes to electronics, but remember seeing it posted that the AW 18350s should be fully charged at right about 4.20v. Mine come off the Tenergy charger I got from Provape at 4.20v, I've never seen any higher readings. If yours are charging to 4.25v I might be a little cautious with them, and maybe try out a different charger or batteries to see if they charge the same amount. Just curious, where did you get your AWs from?
Edit: Just found this on one of AW's threads on the CPF marketplace (link):
Edit: Just found this on one of AW's threads on the CPF marketplace (link):
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