Batterys question

[dripster]

He's talking a tube mech in a series stacked configuration.

8.4v @
228watts

He's running a 0.3 to 0.31 at 27.143amps, a little on the higher side but still well within what Mooch claims the VTC5A is capable of, especially on a claimed competition mech mod the Purge mod claims to be, and this not even taking into account if he is figuring voltage drop and even lower resistance than what an Ohms Law Calculator is saying.

@dripster O/T was about a regulated mod, not a mech, 2 completely different animals when it comes to amp drain and what is safe, as a regulated uses watts and lowest voltage, not highest voltage and resistance.

228watts/6.0v=38amps/90% DC to DC efficiency=42.22amps <- Regulated
compared to
8.4v/0.3=28amps <-Mech/Unregulated

Off topic: my build actually is closer to 0.23 ohms. The 228 watts was just my guesstimate so lose about half a volt or so per VTC5A due to the voltage drop, and lose some more due to the resistance of the brass tubes and copper firing pin).

On topic: no... you can't do that on a regulated mod without getting yourself into serious trouble. Who knows, maybe it will some day be possible to run the Predator in mech mode (with a future version of Arctic Fox installed on it). So at least in theory it can still be done. I know some (or many) people on here adhere to the general rule of thumb that you shouldn't take it up higher than 30 percent above the CDR value reported by Mooch. But if you're doing less than 2 second puffs and you're giving the VTC5A enough time to rest between puffs, you can still be relatively safe as long as you know exactly what you are doing. The bottom line is it's much easier (and safer) to just get the RX300 instead. (Either that, or get a series mech... personally I got several series mechs and an RX300 because, hey... that's what's making me smile!)

 

[dripster]

Well that makes a difference. I still wouldn't feel very comfortable running a stacked mech with such a load. Why can't people simply run rigs that will accommodate their builds safely?

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At those kinds of high wattages on a 24mm RDA with 22mm build deck, after you put freshly charged batteries in you don't take very long puffs. That's just because else you'll literally set the juiced up cotton on fire, so you're not actually stressing the battery too hard.

 

[Tonee N]

At those kinds of high wattages on a 24mm RDA with 22mm build deck, after you put freshly charged batteries in you don't take very long puffs. That's just because else you'll literally set the juiced up cotton on fire, so you're not actually stressing the battery too hard.

My batteries get stressed when they are sitting in the charger and I stare at them! [emoji1]

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[Oomee]

I know some (or many) people on here adhere to the general rule of thumb that you shouldn't take it up higher than 30 percent above the CDR value reported by Mooch. But if you're doing less than 2 second puffs and you're giving the VTC5A enough time to rest between puffs, you can still be relatively safe as long as you know exactly what you are doing. The bottom line is it's much easier (and safer) to just get the RX300 instead. (Either that, or get a series mech... personally I got several series mechs and an RX300 because, hey... that's what's making me smile!)

Nothing like taking what you want from tech info and throwing the rest away to suit personal bias.

If you know EXACTLY what you are doing as stated, you can post EXACTLY how long rest time is specified for the specific over-current drain of that specific cell.
Rhetorical I know, but using Mooch's name like that and only taking what's your POV is not the nicest thing to do.

 

[dripster]

Nothing like taking what you want from tech info and throwing the rest away to suit personal bias.

If you know EXACTLY what you are doing as stated, you can post EXACTLY how long rest time is specified for the specific over-current drain of that specific cell.
Rhetorical I know, but using Mooch's name like that and only taking what's your POV is not the nicest thing to do.

I can post the correct answer to your question of how long the exact rest time needs to be. The answer is no such specifications have officially been made available to the general public, and, as for your remark of "using Mooch's name like that", Mooch himself specifically has stated every person must decide for him/herself. (It's written in his blog right here on ecf.)

 

[Tonee N]

That's just because else you'll literally set the juiced up cotton on fire, so you're not actually stressing the battery too hard.

That only happens at Imfallen_angel's house.[emoji3]


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[Oomee]

There's the point, you can't make any of your earlier statements as accurate, and therefore shouldn't include Mooch's name as further validation.

 

[dripster]

There's the point, you can't make any of your earlier statements as accurate, and therefore shouldn't include Mooch's name as further validation.

Actually no. The point is that the people who claim you shouldn't take it up higher than 30 percent above the CDR reported by Mooch are the people who wrongfully include his name as further validation (not me).

 

[Oomee]

Actually that is just another side of the same coin.
There are no definitive specs for anyone to be quoting and especially with "exact" knowledge of what they are doing.

 

[Tonee N]

How about cotton?

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[Oomee]

How about cotton?

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It gets on my wick

 

[dripster]

Actually that is just another side of the same coin.
There are no definitive specs for anyone to be quoting and especially with "exact" knowledge of what they are doing.

Not sure what you are going on about. I know exactly what I am doing because I am doing exactly what Mooch says I should be doing, which is to decide for myself, and, I didn't say you are safe if you take it up higher than 30 percent above the CDR reported by Mooch, but instead I said you are RELATIVELY safe. There is no "safe". There is no "unsafe". See, I know exactly what Mooch's words are. "There are only 80 shades of gray in between".

 

[Topwater Elvis]

This thread is in the new members section where only safe & sane battery advice should be given.

The OP question was about a regulated power device.

This isn't a place to go off topic hijack a new members thread & talk about a stacked battery mechanical & how hard you push your cells.

It is not 'safe' to exceed the CDR of any cell for any amount of time.

 

[KenD]

Actually no. The point is that the people who claim you shouldn't take it up higher than 30 percent above the CDR reported by Mooch are the people who wrongfully include his name as further validation (not me).

Up to 50-70% of the cdr used to be the standard with mechs, not 30% above the cdr. No sensible mech user would ever suggest exceeding the cdr.

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[dripster]

Up to 50-70% of the cdr used to be the standard with mechs, not 30% above the cdr. No sensible mech user would ever suggest exceeding the cdr.

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I guess that makes me a "not sensible mech user" then, huh? But anyway... not trying to steer this thread off topic so if people want more safety, then sure, I understand, I'm not trying to suggest anyone should do what I do... nor am I trying to suggest anyone shouldn't... exactly because I am with Mooch on this exactly all the way and every last part of the way.