build questions

Status
Not open for further replies.

sleepysworld

Full Member
Jan 11, 2015
17
1
newyork
There a 20 amp continues and 35 pulse for 75 seconds so it's not that I'm worried about just wanna know if the airflow is fine or should switch to my doge. And I was running .35 ohm coils on a samsung 26f icr 5.6 amp max continues so I know when to stop useing the battery ie getting hot or too low voltage and I'm not chain vaping it either just 2 second lung hits to get a quick nic fix at work
 

drunkenbatman

Ultra Member
ECF Veteran
Verified Member
Jan 26, 2014
1,340
1,271
It's windy, USA
There a 20 amp continues and 35 pulse for 75 seconds so it's not that I'm worried about just wanna know if the airflow is fine or should switch to my doge. And I was running .35 ohm coils on a samsung 26f icr 5.6 amp max continues so I know when to stop useing the battery ie getting hot or too low voltage and I'm not chain vaping it either just 2 second lung hits to get a quick nic fix at work

1. With that build you'll get better flavor from the tugboat, more clouds from the doge. Pick.

2. You're right regarding pulse rating, though you have to realize once you're in pulse you're building to failure, and you can't always trust that 1-75 seconds.

Even if you could trust it 100%, if you ever make a mistake or have a malfunction (switch gets stuck, accidently set it down wrong, etc.) instead of a drained battery you have a venting battery.

Keep it in mind and be safe, what's a few .1s really?
 

HecticEnergy

Ultra Member
ECF Veteran
Verified Member
Jan 24, 2014
2,417
1,638
TX, USA
I'm in no way the battery police, and others here have aptly expressed concern, but here's my thoughts:

Someone on here (ECF) uses trustfire batteries, and has for a year or more, without issue. If I recall correctly, he is building sub ohm but only down to like .4 or so.. could be wrong on that.

Many build super low (or stupid low, depending on your understanding of safety) on batteries that simply can't handle the load. They have vented batteries, but claim that its not dangerous: the mod gets hot, and the battery vents, nothing crazy. Just because IMR batteries are "safe chemistry" doesn't mean that they cannot violently vent, just that they are less likely too, personally I see no need to push the envelope. Building low on an ICR battery is just asking for a trip to the hospital IMO.

Just because something hasn't happened, doesn't mean it won't. Just because someone hasn't gotten into an accident while driving drunk doesn't mean they won't, and it certainly doesn't make impaired driving a good idea.

As I recall, EFest purple 35amp batteries are rewrapped LG HE2s. Generally the companies that buy batteries to rewrap get the lower quality batteries, LG saving the best batteries from the run for themselves. I don't remember where I saw that, but it's probably worth looking into if you are going to exceed your batteries continuous amp rating...

As a personal rule I try to stay under the continuous amp rating. That gives me more vape time on the battery, and stresses the cells less so they will likely withstand more charge cycles. I can get satisfying clouds on a .3 ohm build with 24ga... but generally I vape for flavor with single coil 1.2-1.6 ohm 28ga builds - depending on the atty.
 

sleepysworld

Full Member
Jan 11, 2015
17
1
newyork
I mean I'm only going over the continues by like 2 amps and the pulse is 35a so it's fairly safe counting I litterly don't fire longer than 3 seconds and the battery stays cool I've vented icrs before and Ik Ik everyone says there not safe to sub ohm with but I agree but all that happend was the battery got hot and leaked some sort of liquid and I stuck it in a plastic bag with baking soda and recycled it so I'm aware of the signs leading up to a battery venting. And I'll try it on my doge because that stays cooler and the tugboat gets really hot easy
 

FFMedic22

Senior Member
Verified Member
Jan 9, 2015
72
42
Central MS
I mean I'm only going over the continues by like 2 amps and the pulse is 35a so it's fairly safe counting I litterly don't fire longer than 3 seconds and the battery stays cool I've vented icrs before and Ik Ik everyone says there not safe to sub ohm with but I agree but all that happend was the battery got hot and leaked some sort of liquid and I stuck it in a plastic bag with baking soda and recycled it so I'm aware of the signs leading up to a battery venting. And I'll try it on my doge because that stays cooler and the tugboat gets really hot easy

ICRs and IMRs are different. Not trying to be the battery police either, just better safe than sorry IMO.
 

kartoffelfaust

Senior Member
ECF Veteran
Feb 1, 2015
198
130
USA
I've run my efest 18650's down to 0.10. I tested it under load with a multimeter, and the mech mod I was using (a cheap clone) had so much voltage drop (combined with efest battery sag) that the amp draw was only about 19 (it was ~2.6v at the atty on a fully charged battery that read 4.1v directly measured).

That said, bad idea. Heat build up in the mod and atty was something to be reckoned with. Best thing I ever did was switch from the mechanical clone to regulated box mods. No need to build so low any more.
 

readeuler

Ultra Member
ECF Veteran
Verified Member
Jul 17, 2014
1,203
1,945
Ohio, USA
I've run my efest 18650's down to 0.10. I tested it under load with a multimeter, and the mech mod I was using (a cheap clone) had so much voltage drop (combined with efest battery sag) that the amp draw was only about 19 (it was ~2.6v at the atty on a fully charged battery that read 4.1v directly measured).

Just FYI, the battery doesn't care how much battery sag/voltage drop you experienced. Your coils were only seeing 19 amps, but your battery really was pushing out 4.1/0.1 = 41 amps. In other words, more than half the energy was being wasted on the battery/mod, and not the coils. I would be shocked if that setup didn't get very hot very quickly. Agreed on it being a bad idea :)

I strongly disapprove of OP's rationalizing disregard for battery safety, but that's just me. It's just not that hard to build a really great 0.3 ohm coil and stay under 20A, if you truly want to go big.
 

Rsunderl

Ultra Member
ECF Veteran
Verified Member
Sep 4, 2014
1,687
1,032
Silver Spring, MD, USA
sleepysworld,

You asked if what you are doing is a good idea or a bad idea. No one here thinks it's a good idea, so you have your answer.

If you want to continue with your unsafe practice, we don't have the right to stop you, but please don't expect us to agree with your rationalization.

I truly hope that your "minor accidents" with batteries (leaking, etc.) never turn into a major accident (i.e., violent venting), but am reasonably certain that if you continue on your present course, it will. I just hope that you don't get too hurt when it does.
 

HecticEnergy

Ultra Member
ECF Veteran
Verified Member
Jan 24, 2014
2,417
1,638
TX, USA
sleepysworld,

You asked if what you are doing is a good idea or a bad idea. No one here thinks it's a good idea, so you have your answer.

If you want to continue with your unsafe practice, we don't have the right to stop you, but please don't expect us to agree with your rationalization.

I truly hope that your "minor accidents" with batteries (leaking, etc.) never turn into a major accident (i.e., violent venting), but am reasonably certain that if you continue on your present course, it will. I just hope that you don't get too hurt when it does.

Well put. I hope no one else gets hurt from your shenanigans either.



Sent from my iPhone 6 using Tapatalk
 
Status
Not open for further replies.

Users who are viewing this thread