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Question about batteries and amps

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daddyrabbit

Member For 4 Years
My apologies if this is in the wrong forum...

My setup was a SMOK Alien with the Baby Beast RBA. My B&M had a sweet deal on the SMOK TF-RTA G4 (less than $20) so I scooped it up. The G4 has 4 pre-made fused clapton coils in it. Nice clouds and flavor IMO, but at 60-70 watts. One can argue that the BB is better, but hey.

Anyways, when I put the TF-RTA on my Alien, I noticed that the amps were a hair over 21 on a 3-second draw at 3.7 volts. I have LG2 18650's that are rated at 20 amps. I don't "chain vape" as I take a pull maybe once every minute or so for about 30 minutes driving to and from work and while watching the tele at night. The tank gets noticeably warm (I think they all do), and the mod gets pretty warm but only for about 10-15 seconds before it's cool to the touch again.

Eventually, I'm going to place my own regular kanthal a-1 coils in it. Higher resistance and I usually vape that at 45 watts on my BB, but with 4 coils it may require more watts to fire without significant ramp.

Am I taking a risk here? With vaping, I don't like taking risks. Risks have you squeezing ketchup with your other hand forever.

Thanks!
 
shawn.hoefer

shawn.hoefer

Gold Contributor
Member For 4 Years
Your mod provides most of the protections you need, and a warm mod/tank is normal with a build like that. It might be stressing your batteries a very small bit... shortening their lifespan, but not pushing them to go boom. For peace of mind, switching to Sony VTC5A batteries might make sense, but beyond that, no worries...

Kudos for having the sense to ask instead of assuming!

Sent from my SAMSUNG-SM-N910A using Tapatalk
 
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daddyrabbit

Member For 4 Years
I only went over 120 once with the stock coils. Shit gets too hot for me even with glass drip tips.


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gakudzu

gakudzu

Gold Contributor
Member For 3 Years
Member For 2 Years
Yeah, 120 is way to much for the Baby coils. I haven't tried that G4.
 
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daddyrabbit

Member For 4 Years
It comes with a spaced drip tip that has glass in the center and SS on the outside which makes 120 tolerable. The clouds are massive and dense, but the amps go up to 26+. Not worth it if the flavor doesn't change from 70. I'll keep it at 70-75 till I can get some 25A batteries. Not looking to get another mod right now - just got tired of the BB rda randomly leaking.

The only thing about the G4 is that it's a pure unadulterated bitch to wick.


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conanthewarrior

conanthewarrior

Gold Contributor
Member For 5 Years
daddyrabbit said:
It comes with a spaced drip tip that has glass in the center and SS on the outside which makes 120 tolerable. The clouds are massive and dense, but the amps go up to 26+. Not worth it if the flavor doesn't change from 70. I'll keep it at 70-75 till I can get some 25A batteries. Not looking to get another mod right now - just got tired of the BB rda randomly leaking.

The only thing about the G4 is that it's a pure unadulterated bitch to wick.


Sent from my iPhone using Tapatalk
Click to expand...
No one(EDIT@ apart from @gakudzu , sorry mate I missed your post) has noticed or mentioned the fact as you are using a regulated mod, the resistance does not matter- the amp readout on your mod is what is hitting your coil, NOT what is being drawn from your batteries.

We have to remember a lot of people still do not realise with a regulated mod, Ohms law is not used the way it would be with a mech mod to calculate amp load on batteries.

120W is the same at 0.1 or 1 Ohm on a regulated mod. The watts are what effect amp load on your batteries, so when it was mentioned 120W to keep things extra safe, resistance does not come into play.

Unless you want to run over this power, you do not need 25A batteries, and are at no risk :).

EDIT: For example, your amps would be 120/7.4=16.12A. Add in say 90% efficiency, and you are at 18.01A at 120W. Perfectly safe.
 
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daddyrabbit

Member For 4 Years
shawn.hoefer said:
Kudos for having the sense to ask instead of assuming!
Click to expand...
Yeah, with all the hoopla about exploding mods and batteries, the second to last thing I ever want short of death is my hand misting away whilst I'm driving. Good to know that the readout on the screen is what's on the other side of the chip. The coils that I painstakingly put in there read .18 on my Ohm meter, but the Alien read it at .22, so I knew something may have been off when it came to the amp reading.

Since decimals count when it comes to electricity, I figured it was far better to ask than to assume or write it off as misinformation.

Thanks for all the helpful info.
 
conanthewarrior

conanthewarrior

Gold Contributor
Member For 5 Years
daddyrabbit said:
Yeah, with all the hoopla about exploding mods and batteries, the second to last thing I ever want short of death is my hand misting away whilst I'm driving. Good to know that the readout on the screen is what's on the other side of the chip. The coils that I painstakingly put in there read .18 on my Ohm meter, but the Alien read it at .22, so I knew something may have been off when it came to the amp reading.

Since decimals count when it comes to electricity, I figured it was far better to ask than to assume or write it off as misinformation.

Thanks for all the helpful info.
Click to expand...
Definitely is much better to be safe than sorry for sure!

With a regulated mod though, just know that you can build anywhere within its resistance range and be safe :), it is just the wattage you are running it at that matters. In your case, 120W is more than safe with 20A batteries.

In regards to being a bit off resistance wise, a lot of us, including you, are building low resistance builds. My Ohm meter is not very good, I actually use one of my DNA200's now for building as it is more accurate.
 
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