VV/VW, Amps, and Ohms

[Kumatesh]

So, I was messing around with the Steam Engine battery drain app Battery drain | Steam Engine | free vaping calculators and I noticed that actual amps used by the battery remain the same no matter the resistance of the coil (in the Battery Drain section). How can this be? Is the app incorrect or do regulated mods really draw the same # of amps regardless of coil resistance for a given wattage? If that's the case, then there is no battery life advantage to using any given resistance

For example, we'll use a 1.8 ohm coil and a 0.2 ohm coil both at 50W using a Sony US18650VTC5 battery:

1.8 Ohm Coil
Atomizer 9.49V, 5.27A
Battery Drain 4.2V, 13.23A
- Run Time: 10 Minutes

0.2 Ohm Coil
Atomizer 3.16V, 15.81A
Battery Drain 4.2V, 13.23A
- Run Time: 10 Minutes

That just doesn't seem right to me

 

[R Coy]

VxA=W so for higher resistance coils the volts will rise as the amps drop. Think of volts as pressure and amps as flow, watts as volume

 

[Kumatesh]

VxA=W so for higher resistance coils the volts will rise as the amps drop. Think of volts as pressure and amps as flow, watts as volume

Indeed, and that shows up in the 'Atomizer' section, but that doesn't appear to be the case in the 'Battery Drain' section - the section which, supposedly, actually says what your battery is putting out to get the values to the atomizer

 

[R Coy]

Indeed, and that shows up in the 'Atomizer' section, but that doesn't appear to be the case in the 'Battery Drain' section - the section which, supposedly, actually says what your battery is putting out to get the values to the atomizer

Yes, your battery has x amount of watts stored in it, so while wattage remains constant so will battery drain. Note too that many if not most regulated devices won't regulate below a certain point so the accuracy suffers with lower res coils.

 

[Kumatesh]

Yes, your battery has x amount of watts stored in it, so while wattage remains constant so will battery drain. Note too that many if not most regulated devices won't regulate below a certain point so the accuracy suffers with lower res coils.

Interesting. So there is no advantage to using a certain resistance coil over another with regards to battery life while using a regulated mod?

 

[R Coy]

Interesting. So there is no advantage to using a certain resistance coil over another with regards to battery life while using a regulated mod?

Except with the lower end of the resistance range, due to the mods not being able to reduce voltage past a certain point so the output will actually be higher than the device indicates. But yeah, it goes back to the V x A = W

 

[Kumatesh]

Except with the lower end of the resistance range, due to the mods not being able to reduce voltage past a certain point so the output will actually be higher than the device indicates. But yeah, it goes back to the V x A = W

Well interesting. Thank you

 

[R Coy]

Well interesting. Thank you

My pleasure, happy vaping