I need help with Batteries & sub ohm vaping.

[Khalid90]

Hello everyone


I use LG HG2 batteries(3000mah 20a) on Dual battery regulated mods....I started building just recently and I vape between 0.25 minimum and 0.5 ohms max. So I need your help with three questions:

1- is the battery I'm using (LG hg2) Good for the ohms I'm vaping at? and if its not, whats the minimum resistance I should be vaping at with these batteries?

2- are there differences whether I'm using a single battery or dual batteries when it comes to knowing what is the suitable resistance I should be vaping at?

3- Do I have to care about all of this if I only use regulated mods?

Thank you very much

 

[Paratech]

Those batteries are fine.
Since it is a regulated mod, it'll take care of all that for you.
Worse case it you hit the device amp or volt limitations and it prevents you from hitting the numbers you are attempting.

 

[nightshard]

Since it's a regulated device you are limited by the max wattage you should be using, not the resistance of the coil(s).
With 20A batteries you should be fine with any resistance allowable by the mod up to 60W per battery (so up to 120W for 2 batteries).

Though the regulated mod offers some kinds of protections it will not protect you from over stressing the batteries by pushing too high amps, the mod does not know and has no way of calculating the amp rating of the batteries used, so it's up to you to choose the right batteries for your application.

 

[Zamazam]

those batteries are fine in a regulated mod. the mod will have a max amperage output, check the spec's on it.

Single batteries are limited by their voltage and CDR (continuous discharge rate).

Since you are running 2 batteries in series, you will get a max of 8.4 volts @ 20 amps. The actual throughput will be less based on the mods efficiency, usually I assume a 90% efficiency rating.

 

[Slurp812]

Hello everyone


I use LG HG2 batteries(3000mah 20a) on Dual battery regulated mods....I started building just recently and I vape between 0.25 minimum and 0.5 ohms max. So I need your help with three questions:

1- is the battery I'm using (LG hg2) Good for the ohms I'm vaping at? and if its not, whats the minimum resistance I should be vaping at with these batteries?

2- are there differences whether I'm using a single battery or dual batteries when it comes to knowing what is the suitable resistance I should be vaping at?

3- Do I have to care about all of this if I only use regulated mods?

Thank you very much

Your build is irrelevant on a regulated mod. Within the limits of the device itself. The only thing that matters as long as your build is within the limits of the mod is the wattage setting.

 

[Khalid90]

Your build is irrelevant on a regulated mod. Within the limits of the device itself. The only thing that matters as long as your build is within the limits of the mod is the wattage setting.

Thanks for the info, I have got one more question if I may....

So if I wanted to know my battery safety limits by knowing how much amps i'm pulling from the battery, They say the formula is:
Amps=watts divided by volts (3.7 as average).

but what if I had a dual battery device or even three batteries like the wismec dna200, how can I know the amps?

 

[SirRichardRear]

Thanks for the info, I have got one more question if I may....

So if I wanted to know my battery safety limits by knowing how much amps i'm pulling from the battery, They say the formula is:
Amps=watts divided by volts (3.7 as average).

but what if I had a dual battery device or even three batteries like the wismec dna200, how can I know the amps?

for a regulated mod the formula is
P/V=I
resistance doesn't matter
P = Power (watts)
V = voltage
I = currant (amps)
voltage i use the nominal voltage of 3.7 but in general they can fire down to 3.2ish for most mods. as the batteries get weaker current goes up. There is also efficiency to calculate in but we don't' always know that spec. With a dual series mod. voltage i calculate at 7.4 so for instance

100 watts / 7.4v = 13.5 amps

with a triple mod voltage raises to 11.1 so
100 watts / 11.1V = 9 amps

with a single mod

100 watts / 3.7V = 27 amps (which is why a lot of single mods only go up to 75 watts which would be 20 amps)

If you get a triple DNA the Triad is a much better device then the RX

 

[Khalid90]

for a regulated mod the formula is
P/V=I
resistance doesn't matter
P = Power (watts)
V = voltage
I = currant (amps)
voltage i use the nominal voltage of 3.7 but in general they can fire down to 3.2ish for most mods. as the batteries get weaker current goes up. There is also efficiency to calculate in but we don't' always know that spec. With a dual series mod. voltage i calculate at 7.4 so for instance

100 watts / 7.4v = 13.5 amps

with a triple mod voltage raises to 11.1 so
100 watts / 11.1V = 9 amps

with a single mod

100 watts / 3.7V = 27 amps (which is why a lot of single mods only go up to 75 watts which would be 20 amps)

If you get a triple DNA the Triad is a much better device then the RX

Thank you very much for the help.

 

[Slurp812]

Thanks for the info, I have got one more question if I may....

So if I wanted to know my battery safety limits by knowing how much amps i'm pulling from the battery, They say the formula is:
Amps=watts divided by volts (3.7 as average).

but what if I had a dual battery device or even three batteries like the wismec dna200, how can I know the amps?

Battery amps? Simple estimation would be watts you set divided by battery voltage. In reality, there would be some overhead in the chip, like 5 to 10% or so depending. In the case of 2 battery mod, you would use 7.4. So like 150 watts divided by 7.4 is just a tad over 20 amps, plus you would need a little more to operate the chip. I picked 150 for that reason. With 20 amp batteries, 200 watt (2 cell) mods sound a bit silly. That is with fresh batteries. The more you use them, the higher the current must go to maintain that 150 watts. Realistically, you should be using 30 amp batteries if you are vaping over ~120 watts or so. So my rule of thumb ~60 watts per 20amp 18650 cell (in a regulated mod) is fairly safe.

 

[sinner7575]

ok i have a rx2/3 im running 3 imren 3000mah 40a batteries which i know are way over rated! but anyway... .25 dual coil build single wire. im at 50w on the screen and it says 3.61v when i fire it it says13.6a are being used. if i go by the i=p/v it should be reading 4.61a because im using 3 batteries or am i wrong. i was thinking it was still pulling 13.6a but from 3 batteries which would be like 4.61a

 

[SirRichardRear]

ok i have a rx2/3 im running 3 imren 3000mah 40a batteries which i know are way over rated! but anyway... .25 dual coil build single wire. im at 50w on the screen and it says 3.61v when i fire it it says13.6a are being used. if i go by the i=p/v it should be reading 4.61a because im using 3 batteries or am i wrong. i was thinking it was still pulling 13.6a but from 3 batteries which would be like 4.61a

it should be about 4.5 amps
P (50) / V (11.1 because nominal voltage of 3.7 in series so times 3) = 4.5

 

[sinner7575]

so when I hit the fire button I would take the 13.6 A that are on the screen and just divided by three. that explains a lot that's what I wasn't actually understanding I'm pretty new to all this

 

[SirRichardRear]

so when I hit the fire button I would take the 13.6 A that are on the screen and just divided by three. that explains a lot that's what I wasn't actually understanding I'm pretty new to all this

not sure how it calculates on the board. unfortunately board makers don't give good specs. but math wise that makes sense.
Also the amperage the board puts to the atty does not equal the amps drained from the batteries

 

[Slurp812]

ok i have a rx2/3 im running 3 imren 3000mah 40a batteries which i know are way over rated! but anyway... .25 dual coil build single wire. im at 50w on the screen and it says 3.61v when i fire it it says13.6a are being used. if i go by the i=p/v it should be reading 4.61a because im using 3 batteries or am i wrong. i was thinking it was still pulling 13.6a but from 3 batteries which would be like 4.61a

Battery current (amps) and coil amps are not the same. so the 4.6 amps is (approximately) what the batteries are doing while supplying 13.6 @ the load.