voltage and amps and watts, ohm-I!

[pdib]

I still see no reason for the question. vaping at 82 watts isn't going to to give you any flavor at all, just a burnt taste. Any realistic vaping wattage, 20 or below, isn't going to push the C rating of any battery to it's limits.
I also don't see any usable coil being able to handle that amperage without popping, if not insta-flashing! I don't see 28-32 gauge Kanthal taking the 12 amps we are talking for any amount of usable time! Nor do I see any usable point to it.

I'm tucking away at a 26awg Nichrome coil that clocks in @ .5Ω With a fresh battery, I'm at 32 watts and pulling 8 Amps current. This is beyond the manufacturer's own (apparently high) Max Continuous Discharge rating for some of the batteries I have bought from reputable vaping e-tailers. Admittedly, the max pulse discharge rate is substantially higher; but, when we are considering safety, we shouldn't press the limits. I wouldn't want a pocket or purse discharge with my setup and my wife's EH 18500 rated @ 6.6 amps, would I? If I'm missing something here, please clarify.

EDIT: my bad . . . 35.28 watts and 8.4 amps. ( I had also calculated 4 volts and left that number up)

 

[jasl90]

Yeah, I misstated that last point. Yes the amprage of the curcuit increases, but the amp discharge capacity of the batteries doesn't get added togerher. IOW, if a single battery can discharge 20 amps (the newest aw 18650 imr] if you stack 2 of them, they can still only handle 20 amp discharge.

Actually that's where they run into trouble. "Handling" 20 amps simply means that is what the manufacturer says they can do safely. That doesn't keep them from trying... They can, in fact, be forced beyond their rating and that's when they become dangerous.
In a non-pcb protected cell, there is nothing aside from the voltage and the load to limit the amp draw.

Regarding the lack of spec sheets for a lot of batteries: yeah this can be a problem. Going forward I won't be using batteries that I for which I can not find a believable spec sheet. Discharge C ratings are pretty important.

I hope I didn't come off as a jerk, as I truly appreciate your effort to answer my question.

No sweat. We're all here for the same reason. To learn as much as we can and hopefully return the favor by helping others learn from ourselves. The fact is I do a lot more reading than I do answering on this forum. When I do post, it's usually because I think it's an interesting topic or a thought provoking question. My apologies if my reply(s) didn't hit the nail on the head in terms of what you were asking.
Anyway, I sounds like you we're able to dig up the info you were looking for in the first place and that's what matters.

 

[WannaGetHealthy]

Yup and yup and yup. Again, thanx for taking the time to answer the question. I was indeed able to sig up the info. Vape on, man.

 

[pdib]

The fact is I do a lot more reading than I do answering on this forum. When I do post, it's usually because I think it's an interesting topic or a thought provoking question..

Oh, jasl90, that means you find some of my topics interesting!?

 

[jasl90]

Oh, jasl90, that means you find some of my topics interesting!?

Indeed, my friend, I do!

 

[meatsneakers]

pdib, are you checking your numbers at the coil? Those numbers are ideal, but if you check the Natural thread you can see some devices drop a massive amount of voltage.

 

[pdib]

pdib, are you checking your numbers at the coil? Those numbers are ideal, but if you check the Natural thread you can see some devices drop a massive amount of voltage.

Yeah, I mentioned that at #13. In my own case, I just build to a resistance that suits me and my device. Like I said, I call it .5Ω for safety (considering C ratings). If it's really .9Ω in practice; I don't care; because, at that point, .5Ω is just a repeatable reference number in my own subjective experience. Meaning, if my device is adding resistance, I just build a lower res. coil, I meter it for safety, and when its a good vape for me . . . there it is.

 

[beanpusher]

i think you are trying to push batteries to their extreme and with most hi-end batteries a 10amp continuous drain is more than sufficient for vaping comfortably. you sound like you are smart but not really. are you trying to be an extreme vaper or do you want a nice setup that will last, not kill the flavor of the juice, and not be unsafe for continuous use? i find that vaping under .8 ohms imo are just too warm to enjoy, turns ur genny into a juice ....., and doesn't let you vape all day on a single battery. i don't even want to get into stacking. it's just asking for trouble. it seems like you want to be cautious before jumping in. before you get into any dangerous situations you will see that the vape you are getting is just not as satisfying.

 

[pdib]

If I'm running an 8 amp current from a battery rated at 20 amp continuous discharge, this is dangerous? That's the safety part.

The quality part: me and meatsneakers up there just got done discussing how I'm probably at a .8Ω equivalence anyway: how the metering is probably inaccurate due to device resistance, and how I nonetheless go with the LOWER resistance figure for SAFETY and how, after I've ascertained that its SAFE, I go by vape quality and build the SAFE coil that tastes good and compensates for device resistance.