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oatabix

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Oct 28, 2015
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Hi All,

So reading up about battery safety and such, trying to figure out what i can / cannot do.

I have a 0.15ni stock uwell coil in my uwell crown with a 200W sigeli TC mod.

I have in x 2 High Drain 18650 Samsung 30Q 3000mAh, 30A, 3.7V batteries inside.

So my "AMPS" = voltage / resistance, right? This comes in at 18.5 - which my batter can deal with, right?

However, looking at Steamengine, it also gives me a "power" rating of 68.45. So if i were to exceed that, say go to 100W, would the amps i'm drawing exceed 18.5??

Continuing on from this, i don't even use "Watt" mode, so if i use say 300 Celsius in TC mode is there a comparable watt that this is essentially at, or is it done differently??

Just sticking this up there because i don't want to misuse my mod and use batteries that aren't capable of dealing with the coils i use / temperatures i use. I think i'm well within my limits with these batteries, but i still want to check i've got a) the math right and b) get some things cleared up

Ta in advance for answers =D
 
Hi All,

So reading up about battery safety and such, trying to figure out what i can / cannot do.

I have a 0.15ni stock uwell coil in my uwell crown with a 200W sigeli TC mod.

I have in x 2 High Drain 18650 Samsung 30Q 3000mAh, 30A, 3.7V batteries inside.

So my "AMPS" = voltage / resistance, right? This comes in at 18.5 - which my batter can deal with, right?

However, looking at Steamengine, it also gives me a "power" rating of 68.45. So if i were to exceed that, say go to 100W, would the amps i'm drawing exceed 18.5??

Continuing on from this, i don't even use "Watt" mode, so if i use say 300 Celsius in TC mode is there a comparable watt that this is essentially at, or is it done differently??

Just sticking this up there because i don't want to misuse my mod and use batteries that aren't capable of dealing with the coils i use / temperatures i use. I think i'm well within my limits with these batteries, but i still want to check i've got a) the math right and b) get some things cleared up

Ta in advance for answers =D
Well I use Samsung 30Q's in my DNA200's they're OK In there - but If I'mm going for lots of High wattage vaping I tend to use 25R's as they sag less under load than the 30Q's
 
So my "AMPS" = voltage / resistance, right? This comes in at 18.5 - which my batter can deal with, right?

This calculation makes sense for a mechanical mod, but for regulated mod using set wattage, the drain on your battery is:

Amps = Watts/Volts

For 2 x 18650 in series at 3.7 V each (7.4 V total), 100 W draws 13.5 A. That's OK for 30Qs (which are rated 15 A continuous I believe), but as has been said, you can expect sag if you push it hard.

However, you will never be vaping at 100 W for more than a split second in TC anyway, the mod will back way down. My single coil builds drop down to about 10-15 W to hold temperature, duals around 15-25 W.

I use 2 x Samsung 30Q in my Cuboid for TC vaping, no issues.
 
This calculation makes sense for a mechanical mod, but for regulated mod using set wattage, the drain on your battery is:

Amps = Watts/Volts

For 2 x 18650 in series at 3.7 V each (7.4 V total), 100 W draws 13.5 A. That's OK for 30Qs (which are rated 15 A continuous I believe), but as has been said, you can expect sag if you push it hard.

However, you will never be vaping at 100 W for more than a split second in TC anyway, the mod will back way down. My single coil builds drop down to about 10-15 W to hold temperature, duals around 15-25 W.

I use 2 x Samsung 30Q in my Cuboid for TC vaping, no issues.

Hi danb, thanks for your reply :)

ok so a quick google on the difference between mech / regulated mods - so i have a regulated mod.

Amps = Watts/Volts - awesome - my question is how can i do this calculation if im in TC mode and don't know the watts??

I'm fairly sure i'm within my limits with the batteries i have, but that's now not the issue, now i'm just genuinely wondering if there is a way i can figure out my watts in TC mode to make my calculations

cheers
 
The Wattage the mod uses in TC mode varies anyways as the chip is programmed to keep a certain temperature range when used so the amount of power required to keep in that range will change. Sorry to add a bit more chaos to your calculations

A regulated box is just that, it is regulated so it can't really fire anything outwith it's programmed values. The batteries you have will handle almost anything you can throw at it - within the operating parameters of the box, outwith that the box just won't fire.

But, well done to you for looking into it and knowing your Ohms Law and being a tad wary of what might happen if you get too carried away. Many can learn from you!
 
i'm just genuinely wondering if there is a way i can figure out my watts in TC mode to make my calculations

Short answer: No, but TC doesn't use high wattage so I wouldn't worry about it.

I'm not familiar with the mod you have - can you set the wattage in TC or is it one of those soft/medium/hard type mods?

Or do you set joules? If so, joules = watts in this context (in reality, joules = watts per second). For some reason Yihi decided to use joules instead of watts on their TC displays, but setting 50J is exactly the same as setting 50W.

You can use the set wattage value to to calculate the maximum possible strain on your batteries, but in TC vaping the applied wattage will drop quite low. I've never seen my tanks level out at >25W during a TC vape. For a single coil with 28g wire I usually see it level out around 15W - the value will be higher for dual coils and/or thicker wire, but I doubt it will ever go above 30 W (I could be wrong).
 
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