Steam engine help with series mod (Noisy Cricket)

[DilFisher]

So my overall question im trying to find out is:
im running a .9 ohm 26g dual basic build with the purple imrens (3.7 2500mah) on the noisy cricket (series) so that brings it to 7.4 (on a full charge)
I basically just want to make sure im in the clear with this set up, but I want to know how to look these specific batteries (or batteries with the same specs) up and input the right information in steam engine, as far as a series mod goes, so I can do the research myself.
I know I dont want to be over 20A
As far as my preference, I dont want to go below a .6
I still have many other regulated devices im currently using until I really get to know this thing. Im clear on the basics but I need a push in the right direction when it comes to batteries, translation and navigation in steam engine - again, specifically when it comes to series.
Thanks in advance.

 

[sonicbomb]

With a series mod you double the voltage, the mAh (runtime) and amp limits stay the same. A fully charged 18650 is 4.2 volts, so will have 8.4 volts to play with.

Before we go any further, are your two Imrens 2500 mAh or the 3000 mAh?

 

[Ryedan]

So my overall question im trying to find out is:
im running a .9 ohm 26g dual basic build with the purple imrens (3.7 2500mah) on the noisy cricket (series) so that brings it to 7.4 (on a full charge)

Each battery when fully charged will put out very close to 4.2V, so two in series add up to 8.4V.

I basically just want to make sure im in the clear with this set up, but I want to know how to look these specific batteries (or batteries with the same specs) up and input the right information in steam engine, as far as a series mod goes, so I can do the research myself.

To calculate battery amp draw, on the battery drain page in SE, click on "Unregulated mech", enter 8.4V for "Battery voltage", then your resistance in the "Atomizer resistance" field. At 0.6 ohms, your minimum resistance preference, you'll be drawing 14 amps from each battery and will be outputting around 117 watts. The wattage will actually be lower than that due to battery voltage drop under load, but it's in the ballpark

To find out what your batteries can deliver safely, check out Mooch's battery test results. If you stay within those guidelines my bet is you'll be safe.

I know I dont want to be over 20A
As far as my preference, I dont want to go below a .6
I still have many other regulated devices im currently using until I really get to know this thing. Im clear on the basics but I need a push in the right direction when it comes to batteries, translation and navigation in steam engine - again, specifically when it comes to series.
Thanks in advance.

If you did that resistance with a single battery mech mod (at 4.2V) you would get an amp draw of 7A and around 29 watts. To get the same ~117 watts with the single battery you would have to drop the resistance to 1/4 of the 0.6, so 0.15 ohms and the amp draw would be twice 14A = 28A.

So your 0.6 ohm setup in a dual series battery mech mod will put out about the same wattage as a 0.15 ohm build in a single batt mech mod would

Hope that helps a bit.

 

[DilFisher]

Each battery when fully charged will put out very close to 4.2V, so two in series add up to 8.4V.



To calculate battery amp draw, on the battery drain page in SE, click on "Unregulated mech", enter 8.4V for "Battery voltage", then your resistance in the "Atomizer resistance" field. At 0.6 ohms, your minimum resistance preference, you'll be drawing 14 amps from each battery and will be outputting around 117 watts. The wattage will actually be lower than that due to battery voltage drop under load, but it's in the ballpark

To find out what your batteries can deliver safely, check out Mooch's battery test results. If you stay within those guidelines my bet is you'll be safe.



If you did that resistance with a single battery mech mod (at 4.2V) you would get an amp draw of 7A and around 29 watts. To get the same ~117 watts with the single battery you would have to drop the resistance to 1/4 of the 0.6, so 0.15 ohms and the amp draw would be twice 14A = 28A.

So your 0.6 ohm setup in a dual series battery mech mod will put out about the same wattage as a 0.15 ohm build in a single batt mech mod would

Hope that helps a bit.

It most definitely does. I was able to succesfully plug in the right info, get results back, and thats what I needed.

I still don't know what the C rating on these batteries means and how it effects them, so the results are with that of a 5C rating and looked good so we'll see.

With a series mod you double the voltage, the mAh (runtime) and amp limits stay the same. A fully charged 18650 is 4.2 volts, so will have 8.4 volts to play with.

Before we go any further, are your two Imrens 2500 mAh or the 3000 mAh?

Makes perfect sense. Thanks.
They are the 2500's

 

[sonicbomb]

That's a 20 amp cell, and not a very good one either. It gets very hot close to it's CDR.
Imren Purple 40A 2500mAh 18650 Bench Test Results...only a 20A battery, runs very hot

So build accordingly, or get some better batteries.
20 amp CDR ~ Samsung 25R or LG HG2
30 amp CDR ~ Sony VTC4 Or LG HB2,4 or 6

Battery C Rating

 

[edyle]

So my overall question im trying to find out is:
im running a .9 ohm 26g dual basic build with the purple imrens (3.7 2500mah) on the noisy cricket (series) so that brings it to 7.4 (on a full charge)
I basically just want to make sure im in the clear with this set up, but I want to know how to look these specific batteries (or batteries with the same specs) up and input the right information in steam engine, as far as a series mod goes, so I can do the research myself.
I know I dont want to be over 20A
As far as my preference, I dont want to go below a .6
I still have many other regulated devices im currently using until I really get to know this thing. Im clear on the basics but I need a push in the right direction when it comes to batteries, translation and navigation in steam engine - again, specifically when it comes to series.
Thanks in advance.

Coil wrapping
adjust watts on steam engine till the icon goes green (around 200mW/mm2)

80 watts. 8 volts
watts = volts x amps
80 = 8 x10

you'll be drawing 10 amps.

 

[DilFisher]

That's a 20 amp cell, and not a very good one either. It gets very hot close to it's CDR.
Imren Purple 40A 2500mAh 18650 Bench Test Results...only a 20A battery, runs very hot

So build accordingly, or get some better batteries.
20 amp CDR ~ Samsung 25R or LG HG2
30 amp CDR ~ Sony VTC4 Or LG HB2,4 or 6

Battery C Rating

Right. Thats what ive read so my aim is to keep it away from that 20 just in case.
What I dont know is EXACTLY how to do that. Build higher or lower ohms?

 

[DilFisher]

Coil wrapping
adjust watts on steam engine till the icon goes green (around 200mW/mm2)

80 watts. 8 volts
watts = volts x amps
80 = 8 x10

you'll be drawing 10 amps.

Awesome. I did see this formula, and most of what I know so far about this mod, in the twisted messes video on the cricket.
I wanted to switch into mech devices and saw the cricket, and its appeal got me before I knew anything about it. My wife heard me talking about it and bought it for me not knowing anything either. Since then ive dug into it but still getting there.
Otherwise I wouldnt have purchased it before doing my research.
I will say ive walked into a few B&M shops that are misinforming people ENTIRELY.
Ive been told "dont go below .05 and you're good."....WRONG
"Just dont use a sub ohm tank, you're good."... WRONG AGAIN
This thing is attractive, very affordable, which are the two most important prerequisites for people just starting out... Hell, even majority of us, but is potentially dangerous if in the wrong hands.

 

[DilFisher]

Awesome. I did see this formula, and most of what I know so far about this mod, in the twisted messes video on the cricket.
I wanted to switch into mech devices and saw the cricket, and its appeal got me before I knew anything about it. My wife heard me talking about it and bought it for me not knowing anything either. Since then ive dug into it but still getting there.
Otherwise I wouldnt have purchased it before doing my research.
I will say ive walked into a few B&M shops that are misinforming people ENTIRELY.
Ive been told "dont go below .05 and you're good."....WRONG
"Just dont use a sub ohm tank, you're good."... WRONG AGAIN
This thing is attractive, very affordable, which are the two most important prerequisites for people just starting out... Hell, even majority of us, but is potentially dangerous if in the wrong hands.

I know what rdas to run and why
Which build to aim for and why
Just battery talk is where I need to be informed. Im headed to get some betteries now

 

[Susan~S]

Just dont use a sub ohm tank, you're good."... WRONG AGAIN

That is correct if they were talking about subΩ tanks that can use factory coils. These tanks do not have a protruding pin.

Hybrid Top Caps & Battery Failure