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Battery overdrain protection?
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#1 (permalink)      3/5/2015 12:18:15 PM US Central   quote/reply + tips
Sammetz4297
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Battery overdrain protection?
I know these cut off a battery at the proper voltage. But if you turn the power all the way up, can it over draw from the battery? Like if the battery has a low mAh rating, can this draw too much power too fast causing a battery to overheat and possibly vent?
#2 (permalink)      3/5/2015 12:54:58 PM US Central   quote/reply + tips
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ap614
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If there is a voltage cut off, then it doesn't matter what wattage you are set to, it'll cut off. Higher wattage just means that it will drain to the cut off point sooner.
Drip & Squonk life.
#3 (permalink)      3/5/2015 1:35:51 PM US Central   quote/reply + tips
mtb20
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Cut off for these is a bit low, at about 2.9-3 V.
#4 (permalink)      3/5/2015 3:52:18 PM US Central   quote/reply + tips
Sammetz4297
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But batteries have an amperage limit that can be drawn at one time. Watts= volts x amps. If you increase watts, it increases volts and amps. Could setting the kick to the highest wattage draw too much amps? Causing the battery to be damaged or even fail
#5 (permalink)      3/5/2015 4:10:17 PM US Central   quote/reply + tips
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yorgen
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Sammetz4297 wrote:

But batteries have an amperage limit that can be drawn at one time. Watts= volts x amps. If you increase watts, it increases volts and amps. Could setting the kick to the highest wattage draw too much amps? Causing the battery to be damaged or even fail



Yes, if your using Ni-MH cells, with a low C rating 15W may be too much current draw, leading to thermal runaway.

Check the C rating of your cell, which is the maximum continuous discharge the cell manufacturer advises.

Simply google your cell name ie 'samsung 25r' + 'C rating' or check the manufacturers website for a datasheet.

#6 (permalink)      3/5/2015 4:11:01 PM US Central   quote/reply + tips
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ap614
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+1 details
That's why it has a 1.5 ohm minimum operating range. 12W on a 1.5 ohm build with a fresh battery at 4.2V will still be under 3A.
Drip & Squonk life.
#7 (permalink)      3/5/2015 4:36:38 PM US Central   quote/reply + tips
Sammetz4297
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ap614 wrote:

That's why it has a 1.5 ohm minimum operating range. 12W on a 1.5 ohm build with a fresh battery at 4.2V will still be under 3A.


Thanks. I'm new to mods, but I have a deep understanding of electricity and battery function. You say 1.5 minimum. This means it will still work with a 1.5 ohm atty right? Cuz that is what I'm running right now

#8 (permalink)      3/5/2015 4:39:31 PM US Central   quote/reply + tips
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nerfologist
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yorgen wrote:

Yes, if your using Ni-MH cells


Ni-MH ?

Loud and proud member of the FT EW Club. #EWindahouse - NEW ACHIEVEMENT AWARDED - Entitled Noob. Yayyyy. :D
#9 (permalink)      3/5/2015 4:50:44 PM US Central   quote/reply + tips
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ap614
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@Sammetz as long as the kick reads the atomizer's resistance correctly, then it should fire.
Drip & Squonk life.
#10 (permalink)      3/5/2015 5:30:18 PM US Central   quote/reply + tips
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yorgen
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nerfologist wrote:

yorgen wrote:
Yes, if your using Ni-MH cells
Ni-MH ?



"I can't believe that nimh use isn't more mainstream in the vaping community" from this bridge pierced, riptrip beard wannabe..

Not at all relevant to this kick I admit.

#11 (permalink)      3/5/2015 8:15:45 PM US Central   quote/reply + tips
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viking65
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+1 details
I have this and it fires 1.3ohms and above and my low voltage cutoff is 3.1 volts

It does not have 10 second cutoff and will keep firing if button gets stuck accidentally or autofires.

Edited on 3/5/2015 at 9:19 PM. Reason:
http://i.imgur.com/fKSQtVA.jpg..........You self made victims crack me up. =D