Lower voltage w/ lower ohm coil vs. higher voltage w/ higher ohm coil

[amaze2n]

Today I started using 1.5 ohm dual coils for my Aerotank, using an iTaste 900 mAh VV/VW battery. What prompted me to order these was the severely lacking performance of the coil that came out of the Aerotank box. These were supposedly 2.0 ohms, but the battery showed a reading of 2.2/3/4, at different times... so frankly, I don't know what they were. I figure the first coil was damaged because it kept leaking and produced hardly any vapour, even at 5V, which is why I figured I'd give lower resistance a try. Of course, immediately after placing the order, I switched to the second coil and it worked awesome at 5V. The order arrived today, and now I'm using the 1.5 ohm coils at 3.4V and they seem to be doing well.

I'm wondering which is better (for battery/coil life, safety, flavour): using a 2.0 ohm or higher dual coil at a 4.5 - 5V range, or a 1.5 ohm dual coil in the 3.3-3.8V range. I read somewhere that having low ohms can actually damage your battery. Does this risk persist even at low voltages? Should I be worried about my iTaste? My other main concern is, which setup makes the battery last longer on a charge? Does it make a difference? Are there any other factors to consider here?

Thank you for your help. I've hunted around quite a bit but couldn't find any good answers.

 

[jamie0516]

Interested in the replies you get

 

[Stosh]

The best resistance for your topper is whatever will allow you to use about the middle voltage adjustment on your battery. The difference in the life of the battery charge is slight. Being able to adjust up or down a few tenth of a volt to get the best taste for a particular flavor makes more of a difference.

tobacco, espresso, bourbon flavors like it a bit warmer, where lemon-ice, orange dreamcicle and dulce de leche are better a bit cooler...

 

[rurwin]

The comments you found about low ohms damaging your battery were probably about using ohms a lot lower than you are using, like below half an ohm, on a fixed voltage battery. It doesn't need to concern you, certainly at 1.5 ohms. The VV devices all have safety circuits that will refuse to power a coil with a resistance that might cause damage.

 

[edyle]

Today I started using 1.5 ohm dual coils for my Aerotank, using an iTaste 900 mAh VV/VW battery. What prompted me to order these was the severely lacking performance of the coil that came out of the Aerotank box. These were supposedly 2.0 ohms, but the battery showed a reading of 2.2/3/4, at different times... so frankly, I don't know what they were. I figure the first coil was damaged because it kept leaking and produced hardly any vapour, even at 5V, which is why I figured I'd give lower resistance a try. Of course, immediately after placing the order, I switched to the second coil and it worked awesome at 5V. The order arrived today, and now I'm using the 1.5 ohm coils at 3.4V and they seem to be doing well.

I'm wondering which is better (for battery/coil life, safety, flavour): using a 2.0 ohm or higher dual coil at a 4.5 - 5V range, or a 1.5 ohm dual coil in the 3.3-3.8V range. I read somewhere that having low ohms can actually damage your battery. Does this risk persist even at low voltages? Should I be worried about my iTaste? My other main concern is, which setup makes the battery last longer on a charge? Does it make a difference? Are there any other factors to consider here?

Thank you for your help. I've hunted around quite a bit but couldn't find any good answers.

1:
which is better 2 ohm or 1.5 ohm; shouldn't matter much

2:
low ohms: you itaste vv/vw battery will not fire if the ohms are too low. It checks it for you.

3:
Which setup makes the battery last longer:
Not a big difference if any. But dual coils take more power than single coils and make more fog; they therefore drain the battery faster than single coils of the same ohms.

 

[itskohler]

At 1.5 ohms you're safe. Curious though, whats the max watts it can produce?

 

[Aawa]

Going with lower ohms will only damage the battery if you push the battery to its limits. This is why sub ohming can be dangerous if you do not have the proper battiers and also why variable voltage/variable wattage devices will not fire builds outside of a certain range.

Ohm's Law is Amps = Volts / Resistance.
Wattage = Amps x Volts (this is the total power that your circuit is producing. The higher the wattage, the more power your circuit is handling, the more heat is produced, which is faster drain on your battery)

At 3.4volts and 1.5ohms you are vaping at about 7.7 watts and 2.27 amps
At 5volts and 2.0 ohms you are vaping at about 12.5 watts and 2.5 amps

If you run the 1.5 ohms at 3.4volts you will be gaining battery life as it is drawing less amps from it. You are also pushing less power (wattage) in your circuit which will extend your coil life.

Now the specs for your battery will depend on if it is "safe" to run depends on how many amps you are discharging your battery at. You do not want to go past the safe burst output of amps. Variable voltage/Variable Wattage devices check to make sure your circuit is considered safe, meaning that it makes sure your circuit can safely fire at the voltage and amperage you are requiring. If it does not pass the check, it will not fire. Now with mechanical mods (with out kicks), the circuit will fire at the cost of damaging the battery and/or coil. This is why sub ohmers mostly use mechanical mods and always check out the resistance of their coils. That way they can make sure that they are within the safe limits of the amperage draw from the battery. If they are not in the safe limits, the battery has a chance to go into thermal runaway and either explode, catch fire, or leak.

 

[chebird]

I would agree almost word for word with Aawa, well put and now that you know your Itaste is going to protect you from firing something that would damage it, you are free to experiment with your different juices at slightly different voltages!

 

[amaze2n]

Awesome, I'm not worried about my battery blowing up in my face anymore. Thanks everyone

 

[amaze2n]

Max watts is 11

 

[HoseGarden]

Awesome, I'm not worried about my battery blowing up in my face anymore. Thanks everyone

KABOOM!!

 

[rurwin]

At 3.4volts and 1.5ohms you are vaping at about 7.7 watts and 2.27 amps
At 5volts and 2.0 ohms you are vaping at about 12.5 watts and 2.5 amps

If you run the 1.5 ohms at 3.4volts you will be gaining battery life as it is drawing less amps from it. You are also pushing less power (wattage) in your circuit which will extend your coil life.

Maybe I can take this chance to be pedagogic for a moment.
VV batteries convert the voltage of the battery to the voltage the user has set for the coil. I think we all understand this. But what might not be widely appreciated, is when you transform the voltage in one direction, the current is transformed in the other. The power, watts, is equal on both sides, (except for a bit lost due to inefficiency.)

So a 2 ohm coil running at 12.5 watts will consume just over 50% more battery life than the 1.5 ohm coil running at 7.7 watts. Turning that the way you want to see it, the battery will last around 50% longer with the 1.5 ohm coil than with the 2.0 ohm coil.

 

[amaze2n]

Very good point. This is my first full day of using these coils and the button still shines green when I vape. And I've chain vaped a few times today. Usually by this hour it would be yellow or even dead, since the battery doesn't have a great capacity. I'm thinking of getting a Provari sooner or later. What would you guys recommend?

 

[daviedog]

Provari or not, ohms law still rules. As far as coil resistence , go with 1.5 over 2. Far more efficient use of stored charge. Reread above UK post..

 

[edyle]

Maybe I can take this chance to be pedagogic for a moment.
VV batteries convert the voltage of the battery to the voltage the user has set for the coil. I think we all understand this. But what might not be widely appreciated, is when you transform the voltage in one direction, the current is transformed in the other. The power, watts, is equal on both sides, (except for a bit lost due to inefficiency.)

So a 2 ohm coil running at 12.5 watts will consume just over 50% more battery life than the 1.5 ohm coil running at 7.7 watts. Turning that the way you want to see it, the battery will last around 50% longer with the 1.5 ohm coil than with the 2.0 ohm coil.

If you run the 2 ohm coil at 8 watts
and you run the 1.5 ohm coil at 8 watts
you'll basically get the same battery life.

 

[itskohler]

Doesnt running a 1.5 ohm coil at 7 watts defeat the purpose of a low resistance coil?

 

[edyle]

Doesnt running a 1.5 ohm coil at 7 watts defeat the purpose of a low resistance coil?

What in your opinion is the purpose of a low resistance coil?

In the case of a mech with no kick so no issue of higher voltage, instead of using higher voltage you use lower resistance.

If you juice is vaping nicely at 7 watts, then whether you use a 1.5 ohm coil or a 2 ohm coil, you're going to want to end up at 7 watts.

 

[itskohler]

I didn't see it from that angle, I run mechs exclusively so thats the way I apply and process stuff. That makes total sense now, vape on.