Calculating amp draw series

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Randy Smith

Senior Member
Dec 2, 2015
136
61
Sigelei 150w tc
LG he4 x 2

Releaux dna 200
LG hg2 x 3

I'm still confused on how to calculate the amp draw with these regulated devices.

I use 0.15 - 0.4 ohm coils only.

With the three batteries or the two batteries is the draw being divided between the batteries? Right now on the releaux I've got a 0.19 dual fused clapton at 70 watts. What's the amp draw? A single 18650 would be 19.19A, but is it dividing for me ??

Or should I worry with the regulated? Doesn't the dna have over discharge protection?

Sent from my SGH-I337M using Tapatalk
 

IMFire3605

Ultra Member
ECF Veteran
May 3, 2013
2,041
3,148
Blue Rapids, KS, US
Sigelei 150w tc
LG he4 x 2

Releaux dna 200
LG hg2 x 3

I'm still confused on how to calculate the amp draw with these regulated devices.

I use 0.15 - 0.4 ohm coils only.

With the three batteries or the two batteries is the draw being divided between the batteries? Right now on the releaux I've got a 0.19 dual fused clapton at 70 watts. What's the amp draw? A single 18650 would be 19.19A, but is it dividing for me ??

Or should I worry with the regulated? Doesn't the dna have over discharge protection?

Sent from my SGH-I337M using Tapatalk

Regulated Series configurations the calculation is (Max Wattage or Wattage Set/Lowest Battery Charge=Amps)

Series Configuration Voltage is Double, mAh and CDR are the same as a single battery, so lowest battery charge is 3.2v with most mods before cutoff, we double and triple here.

Sig150
150watts max/6.4=23.4375 amps both batteries must provide, on both it is 23.4375amps, not divided across both

Releaux 200watt, 3x batteries, lowest power state is 9.6v
200 watts max/9.6v=20.83333amps all three batteries have to provide.

Parallel configuration like the iStick100watt, voltage is the same as a single battery, mAh and Amp load and balanced between both batteries.
100watts/3.2v=31.25amps total 31.25/2batteries=15.625amps each battery has to provide
 

edyle

ECF Guru
ECF Veteran
Verified Member
Oct 23, 2013
14,199
7,195
Port-of-Spain, Trinidad & Tobago
Sigelei 150w tc
LG he4 x 2

Releaux dna 200
LG hg2 x 3

I'm still confused on how to calculate the amp draw with these regulated devices.

I use 0.15 - 0.4 ohm coils only.

With the three batteries or the two batteries is the draw being divided between the batteries? Right now on the releaux I've got a 0.19 dual fused clapton at 70 watts. What's the amp draw? A single 18650 would be 19.19A, but is it dividing for me ??

Or should I worry with the regulated? Doesn't the dna have over discharge protection?

Sent from my SGH-I337M using Tapatalk

forget the amps and just look at the watts per battery instead.

on the releaux you've got 3 batts supplying 70 watts.
That's 23 watts per batt.
 

IMFire3605

Ultra Member
ECF Veteran
May 3, 2013
2,041
3,148
Blue Rapids, KS, US
Regulated mod

Wattage/Lowest Battery Charge = Max Amps to be pulled from the batteries. There is no over thinking, no magic number, that is the formula.

Series configuration we adjust the voltage by number of batteries, as it is basically stacking just like batteries in a Maglight Flashlight, 3.2v lowest charge, 4.2v fresh charge, so series of 2 batteries = 6.4v and 8.4v, 3 batteries = 9.6v and 12.6v. It's not that complex, I've given you the answer above for both mods, the reference to the iStick100w was to show what a parallel regulated box mod is calculated.

Mechanicals
with these then you start looking at Resistance as a major factor, where a regulated the only consideration of resistance is if the firmware of the control board supports a coil that low in resistance, on a mech the coil is your only throttle and safety brake.

1ohm coil with a fresh charged battery at 4.2v= 4.2amps
0.5ohm coil = 8.4amps
0.25ohm coil = 16.8amps
0.14ohm coil = 30amps

So, answer is yes, if the mod firmware can handle a 0.1ohm coil, 100watts is the same amp draw as 100watts with a 0.5ohm coil, a regulated mod adjusts for watts through raw voltage, thus why most the higher end regulateds use series battery configurations, where with a mech, to increase watts given a set voltage that can not be adjusted, then Ohms (Resistance) come into major play.
 

roxynoodle

Unregistered Supplier
ECF Veteran
Jun 19, 2014
15,344
37,212
Ohio
Thank you so much for dealing with my dumb questions lol. I was all worried about my amp draw but it all makes so much sense now hahahahaha

Sent from my SGH-I337M using Tapatalk

:)

And hey, you learned something new and helpful to your vaping career. And did the math, good job!

Better than one person I know who won't even put the numbers into a calculator and calls me instead :D
 
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