Mech mods

[Sheventyeight]

hi everyone, new member here!!
I did my ohms law study, however i still dont understand how some vapors vape on mech mods with a build as low as .09 or .15 lets say with a sony vtc 5 with a 20A discharge! Isnt that exceeding the 20A on that battery? How is that safe? Thanks in advance for any reply much appreciated.

 

[IMFire3605]

When in competition level there are a whole host of other calculations that go into it on top of Ohm's Law, voltage drop, pulse discharge ratings, length of pulses for those discharges. 9/10 Mech users, Volts/Resistance=Amps, yes considering voltage drop you can a bit further, but still getting in the ball park area gives some safety room over oh an extra 10watts of output not going to matter that much on a mech. In all honesty you shouldn't be building on mech to take more than 50% to 75% of the max CDR, batteries age with abuse and time, heavy abuse (max CDR) all the time the battery at 30days could only be 50% its factory capability, where running at 50% already, that battery will last out for a good 9 months to year.

 

[zoiDman]

hi everyone, new member here!!
I did my ohms law study, however i still dont understand how some vapors vape on mech mods with a build as low as .09 or .15 lets say with a sony vtc 5 with a 20A discharge! Isnt that exceeding the 20A on that battery? How is that safe? Thanks in advance for any reply much appreciated.

On a Single Battery Mech, it Isn't safe to use a Build that Low.

But if a person is using a Dual Battery Parallel Mech Mod, the Amp Load is spread out over the Number of Batteries in Parallel.

So if the build created a 40 Amp Load, each Battery in a 2 Battery Parallel Mech would need to provide 20 Amps.

Here is a Good Article that Explains the Difference between a Parallel and a Series Mech Mod.

Unregulated Parallel Box Mod vs. Unregulated Series Box Mod | Vaping Battery Safety

 

[zoiDman]

hi everyone, new member here!!
I did my ohms law study, however i still dont understand how some vapors vape on mech mods with a build as low as .09 or .15 lets say with a sony vtc 5 with a 20A discharge! Isnt that exceeding the 20A on that battery? How is that safe? Thanks in advance for any reply much appreciated.

BTW - Welcome to the ECF.

 

[dripster]

The VTC5 uses one of the safest chemistries of all the 18650s available to us. The whole deal also depends on how long you pull and how long you wait between pulls as well as the battery temperature. Those who claim it's not safe to go above the CDR are just touting their own personal opinion as fact. I use the VTC5A instead of the VTC5, and I vape on a single battery mech at .1 ohms pretty much all the time.

 

[zoiDman]

The VTC5 uses one of the safest chemistries of all the 18650s available to us. The whole deal also depends on how long you pull and how long you wait between pulls as well as the battery temperature. Those who claim it's not safe to go above the CDR are just touting their own personal opinion as fact. I use the VTC5A instead of the VTC5, and I vape on a single battery mech at .1 ohms pretty much all the time.

Exceeding a Batteries CDR is Asking for Problems.

Saying things like it depends "how long you pull" or "how long you wait between pulls as well as the battery temperature" Isn't saying anything.

And just because your Battery hasn't Vented, and possible caused your Mech to Explode, doesn't mean that the Next Guy's won't.

 

[Sheventyeight]

When in competition level there are a whole host of other calculations that go into it on top of Ohm's Law, voltage drop, pulse discharge ratings, length of pulses for those discharges. 9/10 Mech users, Volts/Resistance=Amps, yes considering voltage drop you can a bit further, but still getting in the ball park area gives some safety room over oh an extra 10watts of output not going to matter that much on a mech. In all honesty you shouldn't be building on mech to take more than 50% to 75% of the max CDR, batteries age with abuse and time, heavy abuse (max CDR) all the time the battery at 30days could only be 50% its factory capability, where running at 50% already, that battery will last out for a good 9 months to year.

Thanks for the tip, as a matter of fact i build on .25 ohms and above just to be on the safe side.

 

[Sheventyeight]

BTW - Welcome to the ECF.

Thanks man

 

[Sheventyeight]

On a Single Battery Mech, it Isn't safe to use a Build that Low.

But if a person is using a Dual Battery Parallel Mech Mod, the Amp Load is spread out over the Number of Batteries in Parallel.

So if the build created a 40 Amp Load, each Battery in a 2 Battery Parallel Mech would need to provide 20 Amps.

Here is a Good Article that Explains the Difference between a Parallel and a Series Mech Mod.

Unregulated Parallel Box Mod vs. Unregulated Series Box Mod | Vaping Battery Safety

Clear, thnx for the articles as well

 

[dripster]

Exceeding a Batteries CDR is Asking for Problems.

That still depends on whether the person doing it did his/her homework on battery safety.

Saying things like it depends "how long you pull" or "how long you wait between pulls as well as the battery temperature" Isn't saying anything.

That's only your own personal subjective opinion.

And just because your Battery hasn't Vented, and possible caused your Mech to Explode, doesn't mean that the Next Guy's won't.

I know a Lithium rechargeable battery can start to vent. I also know what to do when that happens, and I also know my mech won't explode without any warning signs. But what truly worries me is that nobody in this thread has asked questions like whether the VTC5 being discussed by the OP was fully charged, and why nobody in this thread has pointed out the fact the voltage sag of this same VTC5 will be so big that the current drawn from it will not be so big as many think. So this is exactly what I mean when I say people need to first do their homework on battery safety before handing out advice about it.

 

[IMFire3605]

That still depends on whether the person doing it did his/her homework on battery safety.

That's only your own personal subjective opinion.

I know a Lithium rechargeable battery can start to vent. I also know what to do when that happens, and I also know my mech won't explode without any warning signs. But what truly worries me is that nobody in this thread has asked questions like whether the VTC5 being discussed by the OP was fully charged, and why nobody in this thread has pointed out the fact the voltage sag of this same VTC5 will be so big that the current drawn from it will not be so big as many think. So this is exactly what I mean when I say people need to first do their homework on battery safety before handing out advice about it.

"AND THIS IS THE NEW MEMBERS SECTION", thus highly advanced battery safety discussion has its own sub-forum for that, where it needs to be taken.

Batteries and Chargers

In the New Members Section we preach safety and basics, not the advanced theories.

That simple enough for you to understand in this sub-forum????

 

[dripster]

"AND THIS IS THE NEW MEMBERS SECTION", thus highly advanced battery safety discussion has its own sub-forum for that, where it needs to be taken.

Batteries and Chargers

In the New Members Section we preach safety and basics, not the advanced theories.

That simple enough for you to understand in this sub-forum????

The OP asked "How is that safe?", to which I replied.

 

[zoiDman]

That still depends on whether the person doing it did his/her homework on battery safety.

...

No. There is a Point where No Matter how much "Homework" a person does, it can't overcome Physics.

Hey if you want to pull 40 Amps thru a Battery that has a CDR of 25A, be my guest. It isn't My Hand. And it Isn't my Teeth.

But Why would you even consider Advocating something like that in the New Members Forum?

 

[dripster]

No. There is a Point where No Matter how much "Homework" a person does, it can't overcome Physics.

Hey if you want to pull 40 Amps thru a Battery that has a CDR of 25A, be my guest. It isn't My Hand. And it Isn't my Teeth.

But Why would you even consider Advocating something like that in the New Members Forum?

I never claimed it was possible to overcome physics.

I am not pulling 40 amps through anything.

I did not advocate anything.

 

[zoiDman]

I never claimed it was possible to overcome physics.

I am not pulling 40 amps through anything.

I did not advocate anything.

OK. Maybe Amps work Differently where you live.

How Many Amps are you asking your Freshly Charged VTC5A to provide when running it in a Single Battery Mech with a 0.1 Ohm build?

The VTC5 uses one of the safest chemistries of all the 18650s available to us. The whole deal also depends on how long you pull and how long you wait between pulls as well as the battery temperature. Those who claim it's not safe to go above the CDR are just touting their own personal opinion as fact. I use the VTC5A instead of the VTC5, and I vape on a single battery mech at .1 ohms pretty much all the time.

 

[dripster]

OK. Maybe Amps work Differently where you live.

How Many Amps are you asking your Freshly Charged VTC5A to provide when running it in a Single Battery Mech with a 0.1 Ohm build?

Only about 35 amps.

 

[Oomee]

Jesus H Dripster where did you learn about electricity?
At McDonaulds?

 

[MaxximusRevelation]

Only about 35 amps.

Actually 42 amps

 

[MaxximusRevelation]

Don't confuse luck with knowledge and then pass it on to people who don't know any better and may take your word

 

[dripster]

Actually 42 amps

So you've never actually heard of voltage sag?