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There's a whole ton of other variables that can effect the quality of the vape, but their influence will likely be minimal.
Generally speaking, and not considering these other variables, the output will be the same.
I would personally prefer the higher resistance & voltage in the interest of prolonging battery life
Hope this helps!
Generally speaking, and not considering these other variables, the output will be the same.
I would personally prefer the higher resistance & voltage in the interest of prolonging battery life
Hope this helps!
Oh, there is a lot that is said about it around here. Some of what is said is incorrect, when it comes to battery discharge over time. However, in your example, the 1.2 ohm @ 3v could be stressful to the battery chemistry, depending upon the battery, due to the higher current demand.
There are a number of factors involved in how an atomizer performs. While the power consumed may be the same, there would usually be physical differences that change performance, such as the length and gauge of the resistance wire. Both of those have a fair amount of impact upon the performance of the unit.
Here is one thread that addresses some of those details:
http://www.e-cigarette-forum.com/fo...-not-matter-its-all-about-wire-temp-read.html
Generally, as long as everything else is kept as equal as possible, there should be no astounding differences, but there often will be some difference.
There are a number of factors involved in how an atomizer performs. While the power consumed may be the same, there would usually be physical differences that change performance, such as the length and gauge of the resistance wire. Both of those have a fair amount of impact upon the performance of the unit.
Here is one thread that addresses some of those details:
http://www.e-cigarette-forum.com/fo...-not-matter-its-all-about-wire-temp-read.html
Generally, as long as everything else is kept as equal as possible, there should be no astounding differences, but there often will be some difference.
7.5 Watts at 3 Volts = 2 1/2 Amps current draw.
7.5 Watts at 5 Volts = 1 1/2 Amps current draw.
7.5 Watts at 5 Volts = 1 1/2 Amps current draw.
If everything about the device was the same (air resistance, chamber size, distance from mouth, etc) then equal wattage providing the coils were the same temp would make no difference at all. Coil surface area and appropriate heat are the biggest concerning factors as long as your wicks are capable of counterbalancing the rate of vaporization
You'll drain your batteries quicker at low ohms.
I used to use a 2ohm carto with my Provari and changing to a 3ohm extended the life of my 18650 a lot. If youre charging batteries twice as often your replacement cost for batteries are going to be higher in the long-run as well.
I used to use a 2ohm carto with my Provari and changing to a 3ohm extended the life of my 18650 a lot. If youre charging batteries twice as often your replacement cost for batteries are going to be higher in the long-run as well.
Current at the atomizer is not the same as battery drain current. Conservation of Energy...7.5 watts used by the coil means that 7.5 watts must be supplied from the battery. In an ideal circuit, the battery drain current would be the same. Unfortunately, nothing is ideal; there is an efficiency loss. Longer battery life (at the same wattage) results from better efficiency, not from higher or lower resistance.
[h=4]Battery Life - Low Resistance, High Resistance, and Efficiency.[/h]
Nice blog posts, Rader2146. I was contemplating writing a very similar one on my drive home tonight, as I've also responded to similar topics a few times about that misconception.
While the more recent trend is toward boost converters running from one battery, I wonder if some of the earlier choices of just running a single battery versus a 'stacked' battery configuration in a device with no dc-dc converter may have contributed to it.
While it's not really a fair comparison to compare a single battery to two batteries, the numbers can steer one in the wrong direction.
For a 10 watt vape:
3.7 volts at 1.37 ohms = 2.7 amps
7.4 volts at 5.48 ohms = 1.35 amps
Of course, they are both using the same amount of available power from the energy source, but two batteries in series have twice the watt-hours of a single battery of the same kind, and so will last twice as long. Yet, most of the information on batteries that is out there states that two batteries in series have the same number of amp-hours as one would, which is misleading in this regard. Since the voltage is doubled, so are the watt-hours.
Now, for those stacked battery devices that ran inefficient buck converters, of course the efficiency would be dismal at lower voltages, and much higher at the higher voltages, because those converters often just wasted the excess voltage as heat.
Anyway, nice post.
While the more recent trend is toward boost converters running from one battery, I wonder if some of the earlier choices of just running a single battery versus a 'stacked' battery configuration in a device with no dc-dc converter may have contributed to it.
While it's not really a fair comparison to compare a single battery to two batteries, the numbers can steer one in the wrong direction.
For a 10 watt vape:
3.7 volts at 1.37 ohms = 2.7 amps
7.4 volts at 5.48 ohms = 1.35 amps
Of course, they are both using the same amount of available power from the energy source, but two batteries in series have twice the watt-hours of a single battery of the same kind, and so will last twice as long. Yet, most of the information on batteries that is out there states that two batteries in series have the same number of amp-hours as one would, which is misleading in this regard. Since the voltage is doubled, so are the watt-hours.
Now, for those stacked battery devices that ran inefficient buck converters, of course the efficiency would be dismal at lower voltages, and much higher at the higher voltages, because those converters often just wasted the excess voltage as heat.
Anyway, nice post.
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