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How long can i vape on a 18650?

Teyssere

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Hi. I have a VTC mini 75W. I have the settings at 75w, locked resistance at 0,19 at temp control at 500 degrees F. Anyone know a rough estimate how many ML juice i can vape before charging? I have to charge the battery after about 2ml juice (Half tank). Wondering if theres something wrong with my battery. Its 1 week old. First mod i have so i dont know what to expect..
 

zaroba

Gold Contributor
Member For 5 Years
What brand is the battery? Do you use the charging cable or a separate charger?

2ml is a very small amount of juice to go through before needing a charge, even when running a 0.19 ohm.
 

Teyssere

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Yeah, would be smart to mention what battery i have... Sorry. Its an efest 3100mah 3,7V. 20A. I am using a charging cable directly into the mod.
 

Whiskey

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Gonna depend solely on how much you vape and at what wattage, always have a back up battery charged. For some it may last all day, while others maybe a half day, again depending on use and wattage.
 

Teyssere

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Gonna depend solely on how much you vape and at what wattage, always have a back up battery charged. For some it may last all day, while others maybe a half day, again depending on use and wattage.

Of course, but as i said i go through about 2ml juice before i have to charge the battery. So that kinda says how much i vape :)
 

Teyssere

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There you go:) You answered your own question!!!!:D

But i dont think you understood the question:D I feel that the battery drains fast, so i was wondering how long other people batteries last.. Or, what should i expect out of a new battery on this mod? Is 2ml juice kinda correct, or do i have a weak battery?
 

zaroba

Gold Contributor
Member For 5 Years
Even at 75 watts, I don't think 0.19 ohms should drain a battery with just 2ml of liquid being used. It's only pulling 19.8 amps / 3.7 volts.

I mean, I'm currently dripping on a 0.18 ohm rda @ 90 watts and I will go through 10ml+ of liquid on this pair of batteries. Pulling 4.1 volts / 21 amps. I'm drawing more power and the 2 batteries will last more then 5 times longer then your single battery, and they are only 2500mah batteries vs your 3100. I'm using new Samsung 25Rs though, not eFasts. My old Samsung 25Rs would die after only 2ml of liquid, but they were 6 months old, they stopped holding a charge and my sigelei would think they wee dead when it still reported 40% charge.


It could be a few different things, or any combination of them.
-The internal charger may not be charging the battery fully before thinking it's full (defective mod). Only way to test would be with a different mod.
-The internal charger may not be capable of fully charging it due to manufacturer limitations. Only way to test would be with a different charger.
-The battery may be defective. Only way to test would be with a 2nd battery for comparison.
-The battery may not be as good as the manufacturer specs claim. Would need a battery from a different company to compare.
-Maybe not giving it enough time to charge. The internal charger may be very slow and the battery is 3100mah, might take a lot longer to charge then your expecting. If the charger can only charge at a rate of 200mah, it would take 15 and a half hours to fully charge a 3100mah battery.




I should note though, that my experiences and info is based on non-TC setups using kanthol.
I imagine things will be different on a TC setup.
 
Last edited:

Teyssere

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Even at 75 watts, I don't think 0.19 ohms should drain a battery with just 2ml of liquid being used. It's only pulling 19.8 amps / 3.7 volts.

I mean, I'm currently dripping on a 0.18 ohm rda @ 90 watts and I will go through 10ml+ of liquid on this pair of batteries. Pulling 4.1 volts / 21 amps. I'm drawing more power and the 2 batteries will last more then 5 times longer then your single battery, and they are only 2500mah batteries vs your 3100. I'm using new Samsung 25Rs though, not eFasts. My old Samsung 25Rs would die after only 2ml of liquid, but they were 6 months old, they stopped holding a charge and my sigelei would think they wee dead when it still reported 40% charge. If the charger can only charge at a rate of 200mah, it would take 15 and a half hours to fully charge a 3100mah battery.


It could be a few different things, or any combination of them.
-The internal charger may not be charging the battery fully before thinking it's full (defective mod). Only way to test would be with a different mod.
-The internal charger may not be capable of fully charging it due to manufacturer limitations. Only way to test would be with a different charger.
-The battery may be defective. Only way to test would be with a 2nd battery for comparison.
-The battery may not be as good as the manufacturer specs claim. Would need a battery from a different company to compare.
-Maybe not giving it enough time to charge. The internal charger may be very slow and the battery is 3100mah, might take a lot longer to charge then your expecting.




I should note though, that my experiences and info is based on non-TC setups using kanthol.
I imagine things will be different on a TC setup.


Thats an awesome answer zaroba, thanks alot!

Im thinking that the battery is crap, or the internal charger cant charge it full due to manufacturer limitations. When i charge the battery, the indicator shows that the battery is full, so at least the mod think that its full. I will order some new batteries and do some more testing. I dont smoke(never had either), so im not dependant on the vape. I just thought to myself how many batteries a "pack a day"-vaper would have to carry around if they only got 2ml out of each battery..
 

Slurp812

Bronze Contributor
Member For 4 Years
75 watts is the key here. But still, I would expect more that 2 mls. Maybe the better battery. @ 75 watts, a 20 amp battery is above its limits. Maybe an LG-HB6 would work better. Its rated for 30 amps continuous...
 

vuJim

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I've found, on my eVic-VTC Mini, running an OBS Crius at 35W into .3Ω, using a Samsung 25R (2500mAH, 20A) battery, that I'm having to recharge about every tank-full or so. The Crius has a 4.2ml tank. So I'd say what you're getting is about the same as me.
 

WiSK

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Yeah, would be smart to mention what battery i have... Sorry. Its an efest 3100mah 3,7V. 20A. I am using a charging cable directly into the mod.

I think you shouldn't need to set the mod at 75W for a 0.2 ohm coil at 500F. Have you tried lowering the wattage to say 40-50W and seeing if you are still happy with the vape? Do you take short hits or long hits?

Also, just in case you were not sure about the meaning of a mAh rating: it's means that the battery can deliver 3100 mA for one hour, so 3.1 amperes. However, you aren't using it at 3.1A. Your device is probably (trying to) pull between 25 amps down to 4 amps when the coil hits temperature. You can see you the current on the screen if you are using the version 1.3 or 2.0 firmware.

So the mAh rating isn't always easily comparable between different batteries. It can be that a battery that can deal with more current (amps) has a longer charge despite having a lower rating. To put it another way, your battery might have quite a poor capacity rating if it was measured at 10 amps. Luckily, you can compare many batteries on lygte-info.dk. You can choose different battery and different currents to display.



Presuming that the VTC mini allows the battery to drop down to 3.2 volts before it shows it as empty; here you see that the Efest 2500mAh actually lasts longer at 10 amps that the 3100mAh version. If you would choose 20A for the graph, you will see that the Efest 3100mAh drops voltage very low at this current. Probably it shows "weak battery" message on the VTC mini quite often unless it's fully charged.

TL;DR ignore mAh rating / check the amperage on your display during use / find a battery that has the highest curve at that current down to 3.1 or 3.2 volts.
 

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