Voltage, Resistance, Amps, Wattage and our PV's

[NoizMaker]

Hey all,

I'm wondering who else has taken the few moments required to figure out exactly how much power they use in their PV. Basically, for those who don't know, you can determine all you need to know from your batteries and your atties.

I vape a Cisco LR 306 on an 18650 and a stock 901 on two RCR 123A's, now lets see the difference shall we?

I first want to determine the Amperes, so I start with my battery voltage, then divide it by the resistance of my atty.



3.7v
________ = 2.46666666667 amps
1.5 ohms (LR 306)



So now I know I use 2.466666(...) amps when I vape, however when dealing with power such as this, I believe the wattage may just be the business end of a PV, much like a lightbulb.

To determine watts we simply multiply the Amps by the Voltage of our battery like so;




3.7v x 2.4666(...) = 9.126666(...)




So now I know that my Cisco 306 is performing at roughly 2.5 amps and 9.13 watts with my 3.7 v 18650.

I found this to be highly interesting. Perhaps it is just me, lol, but I actually like figuring this stuff out. Now let's work out the amps and watts of my Omega at 6 volts I will keep it estimated since battery current drops under load anyway.




6 v (2xRCR123)
____________ = 2.4 amps
2.5 ohm (901)




2.4 amps x 6v = 14.4 watts (which explains the considerable difference in my vaping experience)



Anyway folks, I hope this was fun or educational to learn/ read. It's really not that hard and if you google "Ohms Law" it can be explained to you in a plethora of different ways. Anyway hope this helps and I'd rather vape on my feet than smoke on my knees.

 

[Switched]

I have been plying with numbers since I can remember as well as matching liquids to the varying numbers. Where it really get's kinky is when a given voltage device kicks harder than another given voltage device. Not all (subjectivity at play) but some.

 

[NoizMaker]

I have been plying with numbers since I can remember as well as matching liquids to the varying numbers. Where it really get's kinky is when a given voltage device kicks harder than another given voltage device. Not all (subjectivity at play) but some.

I have actually noticed the same thing. I can use the exact same batteries in my Box Mod and it just seems to hit harder than my Omega with a hotspring, lol. I figure this is the additional resistance of the device coming into play but I won't really claim to know.

 

[wood]

gee all this makes me wish i got a fixed voltage mod rather than a vv , too much to know , but i dont know ive never used anything other than a ego so maybe once i start fiddling with numbers i will feel more into it either way im glad i have a mod coming my first one

 

[NoizMaker]

gee all this makes me wish i got a fixed voltage mod rather than a vv , too much to know , but i dont know ive never used anything other than a ego so maybe once i start fiddling with numbers i will feel more into it either way im glad i have a mod coming my first one

Awesome wood! I don't own a VV but I have heard that you can dial in your sweet spot on your atty of choice and test the device with a multimeter. After you figure out how many amps and watts you use, I think it would be handy to dial in that Wattage on any atomizer I had laying around . Then again I also don't own a VV and only know what I like on my fixed voltage mod. Atties vary as well no matter which ones you buy so I'd likely just test the resistance of the atty and adjust the voltage accordingly. I really want an Ali'i VV.

 

[aziffel]

I have actually noticed the same thing. I can use the exact same batteries in my Box Mod and it just seems to hit harder than my Omega with a hotspring, lol. I figure this is the additional resistance of the device coming into play but I won't really claim to know.

Cool to know how to figure watts and I thought I was crazy when the P18 hits better than a silver bullet with the same battery and atty.

 

[Switched]

gee all this makes me wish i got a fixed voltage mod rather than a vv , too much to know , but i dont know ive never used anything other than a ego so maybe once i start fiddling with numbers i will feel more into it either way im glad i have a mod coming my first one

Here is one that will make your ehad spin for a bit. Everybody claims that the eGo does 3.2V and is not a 3.7V device. I run 3.7V devices with the best battery out there and they don't hit like the eGo.

To further exacerbate the dilemma, I have the capability to run an eGo at 3.7V and there is not difference than running a true eGo fitted with a PCB. That same eGo at 4.2 V though, well that is a totally different story. All this using the same liquid and same atty.

 

[NoizMaker]

Here is one that will make your ehad spin for a bit. Everybody claims that the eGo does 3.2V and is not a 3.7V device. I run 3.7V devices with the best battery out there and they don't hit like the eGo.

To further exacerbate the dilemma, I have the capability to run an eGo at 3.7V and there is not difference than running a true eGo fitted with a PCB. That same eGo at 4.2 V though, well that is a totally different story. All this using the same liquid and same atty.

That is very interesting, I noticed this as well. The eGo threads on my box mod hit just as well as my eGo but with more mah. If it can be isolated to the threads, perhaps it is the larger center contact? Or maybe the air notches in the threads allowing superior air flow? Or the materials it is manufactured out of, possibly.

If I could find them I would be buying more eGo threads for my mods, not only for the performance but the options and features. I checked madvapes and they only have standard threads. *shrug*

I think BasilRay mentioned in a vid for the COV Voltmeter that the eGo also doesn't supply constant current to the atomizer, which is puzzling as well.

 

[Switched]

That is very interesting, I noticed this as well. The eGo threads on my box mod hit just as well as my eGo but with more mah. If it can be isolated to the threads, perhaps it is the larger center contact? Or maybe the air notches in the threads allowing superior air flow? Or the materials it is manufactured out of, possibly.

If I could find them I would be buying more eGo threads for my mods, not only for the performance but the options and features. I checked madvapes and they only have standard threads. *shrug*

I think BasilRay mentioned in a vid for the COV Voltmeter that the eGo also doesn't supply constant current to the atomizer, which is puzzling as well.

It doesn't is puses 3.0 - 3.7V for an avg of 3.2V.

http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise-10.htmlI

 

[NoizMaker]

It doesn't is puses 3.0 - 3.7V for an avg of 3.2V.

http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise-10.html

Interesting, thanks for the thread Switched. So odd that the eGo hits so much nicer than a standard 510 yet but only averages .2-ish above it.

 

[Can_supplier]

Voltage drop is the answer..

Take for example you could have a battery the size of a car battery that has 3.7 volts potential, and you could have a battery the size of a pencil with 3.7 volts. Clearly the larger battery is going to be able to handle much more load before the voltage start to far off, while under load.

So to use ohms law perfectly, you would need to measure the voltage, while under the load of the atomizer.

Which is why, not nearly as in-depth hardware wise as you guys are, the same LR 510 atomizer will actually give more hit on an eGO battery over a 510 battery in my view.

 

[NoizMaker]

Voltage drop is the answer..

Take for example you could have a battery the size of a car battery that has 3.7 volts potential, and you could have a battery the size of a pencil with 3.7 volts. Clearly the larger battery is going to be able to handle much more load before the voltage start to far off, while under load.

So to use ohms law perfectly, you would need to measure the voltage, while under the load of the atomizer.

Which is why, not nearly as in-depth hardware wise as you guys are, the same LR 510 atomizer will actually give more hit on an eGO battery over a 510 battery in my view.

Yeah, I originally assumed the mah could be the determining factor, I just wasn't sure. It makes sense that higher mah provides a more constant voltage, I suppose I was just getting confused because the vape is so different. Testing under load would be perfect and I saw this video on it (I hope it embeds properly);




Now why the same battery acts differently depending on the unit, I have no clue. I suppose I will have to test it under load (after I make one of those handy under-load testers) and see the difference between my Omega and Box Mod.

 

[Can_supplier]

Where that is going to get interesting is, didn’t you say they had the same battery in them?

Depending on the internals I bet that is going to make a huge difference also. For example if one of the two has a hair sized wire connecting the battery to the contact, that might make for a limiting factor, such that you could increase the battery size without any increase in performance. Or one of the two having a very inefficient contact in the switch… So possibly the PV with the biggest battery may not win the race here..

 

[NoizMaker]

Where that is going to get interesting is, didn’t you say they had the same battery in them?

Depending on the internals I bet that is going to make a huge difference also. For example if one of the two has a hair sized wire connecting the battery to the contact, that might make for a limiting factor, such that you could increase the battery size without any increase in performance. Or one of the two having a very inefficient contact in the switch… So possibly the PV with the biggest battery may not win the race here..

Exactly, I know that my Omega is all mechanical and that it has no wires, it instead utilizes the entire device as the negative and a floating positive contact to complete the circuit. My box mod on the other hand is using standard gauge wire and an electrical switch, so I can see how the resistance in the unit itself might be a huge factor.

 

[Switched]

Which is why, not nearly as in-depth hardware wise as you guys are, the same LR 510 atomizer will actually give more hit on an eGO battery over a 510 battery in my view.

Yup! the 510 batt is capable of 0.18A whilst the eGo batt delivers 0.65A