A "simple" yes or no question

[rel322]

Throughout my research and wondering around I've come across tons of information my question is as follows.

I was looking at a vaping guide which states "most vapers find that 6-8 watts is the 'sweet spot'" and gives the ohms law to calculate the watts. In another one of my posts someone stated that a 3.7v battery @ 180 mAh would give .666 watts/hour. So my question...

a) If a battery can not produce the amount of watts/hour, equal to or greater than, the watts desired to reach the sweet spot, what happens? (ie does the battery die sooner, does it just not work...)

 

[Beans]

It's just not fulfilling. Higher power=more kick lighter power is like sucking on a straw.

 

[hairball]

It strains the battery and will eventually kill the MOSFET switch inside proprietary batteries.

 

[jrm850]

Yes



j/k. All of the lithium Ion batteries are capable of discharging at your desired wattage. The only thing that will change between batteries of different capacities, 180mah- 220mah etc, is the amount of time that they will maintain the desired voltage.

With that being said I have one of my batteries indicate a short with a LR cartomizer.

 

[DaDoc]

It strains the battery and will eventually kill the MOSFET switch inside proprietary batteries.

+1 hairball



Vape On

 

[brittanyNI]

Simple answer: no

More complex answer. Consider a 3.7V battery and a 3 ohm atomizer (I am rounding the math.)

E=IR, P=I^2R, I = E/R

3.7V/3 Ohms = 1.2A

1.2^2x3 = 4.32 watts

Now consider a 3.7 watt battery and a 2 ohm atomizer

3.7V/2 ohms = 1.9A
1.9^2 x 2 = 7.22 watts

So with a battery voltage of 3.7V, with a different resistance atomizer, you will get different wattages.

Next page.

A battery rating is very deceptive. Batteries have discharge curves such that 180maH may or may not be available depending upon the rate of discharge. I mostly use 380maH batteries. But let's stick with your 180 maH example.

180 maH means that the battery can deliver 180 ma for an hour before it is totally discharged. (voltage at 3.2 v instead of 3.7). It could deliver 180 ma continuously, or it could deliver a far greater amount for a shorter time. For example, it could deliver 2A for 3 seconds, rest for a few seconds and repeat ten times; then be left alone for 30 minutes or an hour before that process is repeated again X times.

How many times the process can be repeated before the battery is discharged is a function of battery capacity and discharge curve under various loads.

So greater maH capacity corresponds to a greater time of usage, and not necessarily greater watts for hitting a "sweet spot."

Next Page.

In general, if the battery/atomizer combination is insufficient, people will overuse the batteries and burn out the atomizers trying in vain to hit their sweet spot. This leads to shorter battery and atomizer/cartomizer life.

However, atomizers are disposable components anyway. Running them at higher voltages will decrease their life span, just like trying to run a 12V car light bulb on 18 V. It will burn brighter/hotter; but will burn out sooner. So to run higher voltages, you should use more robust atomizers. A higher battery rating combined with more robust atomizers is good for people with a higher 6W+ sweet spot.

For me, my sweet spot is 4-5W, which can be easily met using standard gear.

 

[MarkAlan74]

I have found this chart on ECF, I can't remember which post it was but I use it all the time. I was told that the closest to 8 watts is the sweet spot and this chart shows the combination of volt and ohm to find the watts. Hope this helps

 

[jrm850]

It strains the battery and will eventually kill the MOSFET switch inside proprietary batteries.

Have you noticed that the mosfets are letting the magic smoke out when the battery is almost drained? I'm betting that the higher load of the LR atty on the depleted battery creates a gate saturation issue that cooks them. I'm curious if this ever happens on a fully charged battery.

 

[Renzuli]

Wow , Brittany I'm impressed with your concise information . I personally don't worry too much about wattage's / voltages . I just use LR on 3.7, SR on up to 5 volts , and HR on 6 volts and above . And , so far , life is right , in the universe .

 

[AttyPops]

What happens is that it maxes the amps but since it's too low voltage suffers. So you end up with insufficient amps and lower volts (less watts). It is a battery stress. I vape at 5v, 8.333 watts.

P.S.
Yes. (I went glass-half-full on that one)

P.P.S.

Have you noticed that the mosfets are letting the magic smoke out when the battery is almost drained? I'm betting that the higher load of the LR atty on the depleted battery creates a gate saturation issue that cooks them. I'm curious if this ever happens on a fully charged battery.

Interesting.......

 

[dormouse]

That's bs

There is no particular heat that is everybody's sweet spot. Sound like that was written by a power vaper. I like 4-5 watts

Here is the chart - a bit blurry
http://www.e-cigarette-forum.com/forum/modders-forum/71422-atomizer-battery-watts-chart.html

For reference - Joye 510 and Ego are Ego around 3.2 volts, KR808D-1 is 3.7v, and you are not supposed to use LR (low resistance) atomizers or cartomizers on any battery under 400mah (i.e. not on any slim ecig)

And if anyone thinks I have those voltages wrong, see this
http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html

 

[MarkAlan74]

I like your chart better than mine Dormouse, thanks for posting. Great info!!!

 

[rel322]

So I guess my follow up question, does anyone know the Ohms of the carto's used by Greensmoke?

EDIT: Ignore my question, I found my answer (2 Ohms)

 

[dormouse]

I doubt they are 2 ohms but maybe. That's very low for a slim ecig but the KR8 models seem to be able to take it. I think the hottest Vapor4Life (KR808D-1) carto is around 2.5 ohms or so and they can burn my lips. You have KR808D-2 aka E9, the rebrander's incompatible version of KR808D-1

If you ever want to use KR808D-1 stuff (like all of the variety of blank cartomizers including reservoir cartos like Clearomizers etc), LeCig has a D2 to D1 adapter (though refilling your cartos on auto batteries means you are taking a bigger risk of damaging your batteries with a leak)

 

[rel322]

All i know is i found the 2ohms on the forums. but i plan on switching to the D1 once my current batteries die but i'm probably going to cartos that are 2.5-3ohms, the cartos tend to get too warm for my taste