Best set up for DNA30?

Status
Not open for further replies.

GunMonkeyINTL

Senior Member
ECF Veteran
Verified Member
Jun 14, 2014
244
1,002
NC
I'm not sure that that thread settled it. EuroChris argues for resistance not mattering for battery life, while FatherTime's (albeit, unscientific) experiment seems to prove that you get longer battery life out of a higher resistance coil.

I don't use coils of very widely varying resistance (1.3-2.0 max), but it's seemed to me that my batteries last longer on my 2.0 builds than my lower ones. I realize that's anecdotal, but it also seems to align with what we've all been told about Ohm's law.
 

dr g

Moved On
ECF Veteran
Mar 12, 2012
3,554
2,406
Paradise
The thing several people in that thread, and many people miss, is the difference between input and output. Eurochris is right. There is no "free power," energy is conserved, so the same power has to come from the battery no matter how it is applied on the output side of the regulator. The voltage of the battery does not change, so if you were to see a difference in amp draw on the battery with different coils, you would see a different wattage into the regulator, which would either be output as a higher wattage or wasted as heat.

Efficiency differences are related to regulator efficiency at different voltages, and atomizer efficiency with different coil/wick arrangements.
 

GunMonkeyINTL

Senior Member
ECF Veteran
Verified Member
Jun 14, 2014
244
1,002
NC
So, I read and understood the input-output calculation explanation at the link in the other post.

The big unknown seems to be the efficiency part of the equation. Since the evidence, anecdotal as it may be, seems to always point to getting increased battery life out of higher resistance coils, are we to assume that higher resistance coils are usually more efficient? Or, it is just placebo?
 

dr g

Moved On
ECF Veteran
Mar 12, 2012
3,554
2,406
Paradise
So, I read and understood the input-output calculation explanation at the link in the other post.

The big unknown seems to be the efficiency part of the equation. Since the evidence, anecdotal as it may be, seems to always point to getting increased battery life out of higher resistance coils, are we to assume that higher resistance coils are usually more efficient? Or, it is just placebo?

I believe I have heard that regulators are usually most efficient near max voltage. So that squares. Also making high resistance coils, people often go to a thinner gauge wire which heats faster = less button-down time, i.e. more efficient coils.

As for the empiric results reported in that other thread, a big thing to notice is that there was a difference in performance between the low resistance coil and the high resistance coil. So it really wasn't comparing likes to likes. It is difficult to, which is part of what leads to the incorrect perceptions. The true test would be measuring actual button-down time.
 
Incorrect, the load on the battery is determined by wattage output.
I'm confused now.
My build currently is 1.2ohm.
To achieve the 4V output, I need to set 13.5W to match that
And I quite sure the vape is cooler on 7W which is only 2.9V

Is this not good for the battery?
With the Ohm's Law Calculator,
7W will be around 2.4amp
13.5W will be around 3.3amp

So should I tune up to 13.5W that is regulated or 7W unregulated but in lower?
Also, is the W matter the battery life or the amps?
 
Last edited:

dr g

Moved On
ECF Veteran
Mar 12, 2012
3,554
2,406
Paradise
I'm confused now.
My build currently is 1.2ohm.
To achieve the 4V output, I need to set 13.5W to match that
And I quite sure the vape is cooler on 7W which is only 2.9V

Is this not good for the battery?
With the Ohm's Law Calculator,
7W will be around 2.4amp
13.5W will be around 3.3amp

So should I tune up to 13.5W that is regulated or 7W unregulated but in lower?
Also, is the W matter the battery life or the amps?

Not exactly sure what your exact question is, but the DNA will not do anything that is bad for the battery. It throws the low battery at 3.1~3.2v resting.
Wattage is directly related to battery life, wattage is power.
 
Status
Not open for further replies.

Users who are viewing this thread