3.7v vs 4.2v?

[markimar]

So I've got an ego 650mah at 3.7v. And the new maxx is coming out at 650mah 4.2v do you think its going to be a noticeable difference in performance? I've been using LR Atty's from TW and loving it just don't know if a 4.2 will make it worth it?

 

[Kent C]

The eGo rated at 3.7V runs at around 3.2v with a load, but....

http://www.e-cigarette-forum.com/forum/ask-veterans/59371-808-901-801-joye-510-bat-pass.html

scubabatdan:
So the formula is Votage(V)/Resistance(R) = Current(I)

3.7v / 2.1ohm = 1.76(I)

or:

4.2v /2.1ohm = 2(I)

Watts or Power(P) = Current(I) * Voltage(V)

1.76(I) * 3.7v = 6.5W

or

2(I) * 4.2v = 8.4W

sbdan:
6.5 watts seems to be the wattage the attys respond best to IMO.

That sweet spot - 6.5W - is up for debate but I've found it real close to where I want to vape and not burn out attys or taste.

I know that 5V on the regular 510 atty can burn out both:

5V / 2.1ohm = 2.38(I)
2.38(I) * 5v = 11.9W

And 6V gets ridiculously hot:

6V / 2.1ohm = 2.86(I)
2.86(I) * 6V = 17.1W


And just for fun:

eGo batt = @3.2V so:

3.2V / 2.1ohm (reg 510 atty) = 1.52(I)
1.52(I) * 3.2V = 4.88W

3.2V / 1.5ohm LR atty = 2.13(I)
2.13(I) * 3.2V = 6.83W (why some are liking the LR with the eGo)

and 3.7v mod with LR atty:

3.7V / 1.5ohm LR atty = 2.47(I)
2.47(I) * 3.7V = 9.13W - the so-called 'simulated' HV (ie. it's actually wattage not "simulated" wattage. lol)

nice 'effect' on the avatar. Looks like Dave Hill stuff....

 

[candre23]

The ego isn't a 3.7V device. It uses PWM to reduce the effective voltage to 3.2V and extend battery life, just like standard batteries.

The maxx isn't a 4.2V device. "4.2V" is a bit of a marketing trick. All li-ion cells provide 3.7V, but that's an average. At maximum charge they're at about 4.2V, but that quickly drops down to about 3.8V. They'll then slowly drop down as they're discharged to about 3.5V, at which point they'll start to drop quickly and the protection circuitry will cut them off. Claiming the Maxx/Trex/016 is a 4.2V device is like claiming a car that gets an average of 28mpg is actually a 35mpg car, because under ideal conditions, that number is technically possible. It's not exactly a lie, but it's not really accurate either.

As for whether there is a noticeable difference between 3.2V and 3.7V, I certainly notice the extra half-volt.

 

[Kent C]

As for whether there is a noticeable difference between 3.2V and 3.7V, I certainly notice the extra half-volt.

It is noticeable and it's significant in practice, imo. Good info on the rest candre23.

 

[BuzzKill]

1/2 volt can make a HUGE difference.

 

[BradSmith]

It is noticeable and it's significant in practice, imo. Good info on the rest candre23.

Kent, have you tried running the SLB atties on a 5 volt? I got a bunch with the washer and I have not popped one yet (knock on wood). I only drip and make sure they stay wet, but I have to say it's working great for me.

 

[kwcharlie]

1/2 volt can make a HUGE difference.

With the Buzz I tested a ¼ volt change makes the 510 a VERY difference experience. I mean it was a HUGE difference, much more than I would have EVER expected.
It’s so huge that I believe the vaping experience is a cubic relationship to the atty resistance (and therefore a square of the voltage) like a magnetic field. Ever notice how two magnets attract each other as you bring them closer together? Within an inch you go from no perceived attraction to they are pulled from your fingers and snap together, the force of attraction is inversely cubic to the distance between the two magnets.
I think that’s what’s going on with the vaping experience and voltage though I can’t prove it mathematically with any power or heat relationships to voltage. The very small changes in voltage huge affect on vaping just “feels” like tuning the field of a generator with voltage where I deal with a cubic relationship. It doesn’t “feel” like tuning the motor torque/speed with amps/volts where the relationship is squared.

 

[JollyRogers]

The eGo rated at 3.7V runs at around 3.2v with a load,

And just for fun:

eGo batt = @3.2V so:

3.2V / 1.5ohm LR atty = 2.13(I)
2.13(I) * 3.2V = 6.83W (why some are liking the LR with the eGo)

and 3.7v mod with LR atty:

3.7V / 1.5ohm LR atty = 2.47(I)
2.47(I) * 3.7V = 9.13W - the so-called 'simulated' HV (ie. it's actually wattage not "simulated" wattage. lol)

I couldn't agree more with the eGo and a LR 1.5ohm atty. It is very nice. The Pulse Modulation (PM) on the eGo makes it very consistent also. In fact, because of the PM, I would take an eGo/Tornado battery over the Maxx... only thing is, I hate the cost of these batteries and wish there was a way to mod it so I could use replaceable batteries in it and still have the PM... I don't think the Maxx has PM, so it defeats the purpose IMO of having an eGo type PV.

I use an 18650 mod (a lot!) and the difference is noticeable. The batt comes off the charger ~ @4.2v and stays there a lot longer then a 650mah battery ever will. With a regular atty it rocks but with that same LR it tends to be harsh until the atty gets some resistance built up from break in & crud on the coil. But once it's broke in it's a different story, they just don't last long enough!

 

[candre23]

It’s so huge that I believe the vaping experience is a cubic relationship to the atty resistance (and therefore a square of the voltage) like a magnetic field.

Watts = Voltage squared / resistance.

 

[kwcharlie]

Watts = Voltage squared / resistance.

right, but i was going at voltage squared in relationship to amps and cubed in relationship to ohms, it's just how it feels. maybe the process of making vapor puts another order of magnitude to the relationship like making flux does to the math of a generator field

 

[yknotagain]

My sweet spot is in the 4-5v range.

 

[markimar]

So ego and tornado are both at 3.2v? Or is ego 3.7?

 

[Kent C]

So ego and tornado are both at 3.2v? Or is ego 3.7?

Both the same. Rated at 3.7v but actually run around 3.2v.

http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html

 

[candre23]

So ego and tornado are both at 3.2v? Or is ego 3.7?

Quoting myself from another thread:

The ego (both Joye brand and Janty brand) and the Tornado are the same device. The only difference is the bundled accessories/warranty. The Riva is a similar (but not identical) design, which it is made by Eastmall. The Bauway 016 (aka Hello 016, aka F-16) is similar in shape, but larger in size and has double the battery capacity. The 016 also vapes at 3.7V, as opposed to 3.2V for the ego/riva. The Maxx/t-rex is the same size and battery capacity as the ego, but vapes at 3.7V like the 016. So there are four different devices sold under (at least) 9 different names.