Sub Ohm Build=Sub Par Battery Life please help

[Kalaniboi81]

Hey ECF i'm having a problem with my sub ohm build draining my battery withing a few hours of use. I just recently started building sub ohm coils, and needless to say i have pushed all my other hardware to the left. I love the warmth of the vapor, the flavor is awesome and vapor production takes the cake, but when it comes to battery life It's struggling. I want to be able to take this build with me to work and anywhere else i go without needing to swap out batteries left and right. I know they have VV/VW mods out there that can provide the needed V/W's necessary to fire sub ohm builds and provide longer battery life. My current build is a .32 ohm dual twisted 28GA coil and with my sony 18650 running 3.7 volts this build is sucking up 42.8W's a toot. Anyone with personal experience with these devices or anyone with suggestions or i could definitely use some guidance on my next purchase. Thanks ahead of time and VAPE ON!

 

[novamatt]

That's how it works. The whole point of sub-ohm coils is to push massive power - it's what creates that huge vapor and flavor. The downside of pushing massive power is that you drain a battery very quickly. If you want your battery to last longer, you'll need to build a coil with higher resistance, which will reduce the power you're vaping with.

In other words, you have to choose which is more important to you... longer battery life or big clouds. You can't really have both.

 

[Vaslovik]

That will happen with sub-ohm builds. You are drawing more power and .32 ohm is pretty low. I vape at .7 ohm and my batteries last about 3 1/2 - 4 hours each. I have 8 of them I rotate through my mech. So it's normal, and you will have to get used to it. One possible solution could be the LegalVape 4000

 

[joecarroll42]

I don't really have any experience with sub ohm coils. But just having a basic knowledge of electricity says that a sub ohm resistance is gonna pull more current from your battery. Which is why you're using a high drain Sony battery. Which I'm sure you're already aware of if you've moved to this setup. Lol, just thought I would comment. From everything I've read from others, and the set up you're using, it sounds like you're spot on. I've just never heard anyone say exactly how long of a life they get from charge to charge.


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[MorpheusPA]

Not only the above (the build pulls more wattage which drains the battery much faster), but also the voltage drop under draw.

You're going to reach a voltage that won't make you happy faster on a sub-ohm build than any other. Just off the cuff, a sub-ohm build might voltage drop 0.6 V where a higher ohm build will voltage drop 0.2 V. As your battery drops (quickly) toward its nominal 3.7 V, your delivered voltage is lower than it would be on a higher ohm build.

So you've got two things working against you. Lithium batteries drop rapidly into their nominal voltage range from 4.2 volts, then ride for a long time at 3.7 before finally "falling off the cliff" at their end of charge. Under heavy draw, voltage sags quickly, and recovers when you stop drawing.

 

[Kalaniboi81]

That's how it works. The whole point of sub-ohm coils is to push massive power - it's what creates that huge vapor and flavor. The downside of pushing massive power is that you drain a battery very quickly. If you want your battery to last longer, you'll need to build a coil with higher resistance, which will reduce the power you're vaping with.

In other words, you have to choose which is more important to you... longer battery life or big clouds. You can't really have both.

I figured that would be the case and if i need to carry a few batteries then so be it, but i can't give up the clouds LOL. I appreciate the input novamatt!

That will happen with sub-ohm builds. You are drawing more power and .32 ohm is pretty low. I vape at .7 ohm and my batteries last about 3 1/2 - 4 hours each. I have 8 of them I rotate through my mech. So it's normal, and you will have to get used to it. One possible solution could be the LegalVape 4000

Well like novamatt said if that's what it takes then so be it. Thanks for the info!

I don't really have any experience with sub ohm coils. But just having a basic knowledge of electricity says that a sub ohm resistance is gonna pull more current from your battery. Which is why you're using a high drain Sony battery. Which I'm sure you're already aware of if you've moved to this setup. Lol, just thought I would comment. From everything I've read from others, and the set up you're using, it sounds like you're spot on. I've just never heard anyone say exactly how long of a life they get from charge to charge.


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Yeah about 2 hours and they are drained. I agree .32 ohm is really low, but if you haven't tried it trust me it is a whole new beast I can see myself going a little lower in the future, but i need to purchase about a dozen more batteries LOL thanks for the input!

 

[BigCatDaddy]

I just bought some 35 amp Efest 2500mah batts and they are giving pretty good life at 0.5 ohms in a Patriot and Kamry 101.

 

[Kalaniboi81]

Not only the above (the build pulls more wattage which drains the battery much faster), but also the voltage drop under draw.

You're going to reach a voltage that won't make you happy faster on a sub-ohm build than any other. Just off the cuff, a sub-ohm build might voltage drop 0.6 V where a higher ohm build will voltage drop 0.2 V. As your battery drops (quickly) toward its nominal 3.7 V, your delivered voltage is lower than it would be on a higher ohm build.

So you've got two things working against you. Lithium batteries drop rapidly into their nominal voltage range from 4.2 volts, then ride for a long time at 3.7 before finally "falling off the cliff" at their end of charge. Under heavy draw, voltage sags quickly, and recovers when you stop drawing.

You couldn't be more correct on that. It's a bummer that these builds are getting more intense, but yet limited by battery power. Do you have any experience with the Sony 266650 battery?

 

[MorpheusPA]

You couldn't be more correct on that. It's a bummer that these builds are getting more intense, but yet limited by battery power. Do you have any experience with the Sony 266650 battery?

I don't personally (I don't sub-ohm, I just happened to see this thread). However, the 26650 battery series should make you somewhat happier.

In addition to more milliamps, which will make the battery last longer, they should have a larger area for the electrodes, which will make the voltage drop somewhat smaller. That's generally true of all batteries; a D alkaline can handle a much larger draw without severe voltage drop than a AA can.

Mind you, those batteries are huge and the mods that use them even larger. For the 26650, I've never been sure why the capacity isn't larger than it is, given the volume differential from the 18650. Still, it should be better.

 

[Kalaniboi81]

I don't personally (I don't sub-ohm, I just happened to see this thread). However, the 26650 battery series should make you somewhat happier.

In addition to more milliamps, which will make the battery last longer, they should have a larger area for the electrodes, which will make the voltage drop somewhat smaller. That's generally true of all batteries; a D alkaline can handle a much larger draw without severe voltage drop than a AA can.

Mind you, those batteries are huge and the mods that use them even larger. For the 26650, I've never been sure why the capacity isn't larger than it is, given the volume differential from the 18650. Still, it should be better.

And that's what i was wondering. They are extremely bulky, and in addition to purchasing one i would need to purchase a mod that uses one. All in all it sounds like quite a bit of $$, but always an option. I didn't know that the voltage drop would be decreased, but after reading that does make sense. Great info thanks!

 

[mujuru]

I don't personally (I don't sub-ohm, I just happened to see this thread). However, the 26650 battery series should make you somewhat happier.

In addition to more milliamps, which will make the battery last longer, they should have a larger area for the electrodes, which will make the voltage drop somewhat smaller. That's generally true of all batteries; a D alkaline can handle a much larger draw without severe voltage drop than a AA can.

Mind you, those batteries are huge and the mods that use them even larger. For the 26650, I've never been sure why the capacity isn't larger than it is, given the volume differential from the 18650. Still, it should be better.

3500mAh on the MNKE isn't bad though... i use mine regularly and find that in real life usage, they last longer than my VTC4, relative to their mAh rating, meaning i feel that it lasts me somewhere around the equivolent of 2 VTC4 rather than 1.5... But I think a lot of people like playing wit low builds on the 50Amp Sonys and having access to a 50A battery is worth the extra bulk..

Edit: oh yeah.. to the OP: I think everyone hit on it above.... its sort of the nature of the beast... But peep out the VTC5s.

 

[Jeffk123]

I am getting me a hades mod for this reason I just got really into the whole parallel coil build and it rips for sure but I can only use it on my now outdated 20watt device or else ill be switching batts every hour, but hey the vape is worth it. cloud on man

 

[Kalaniboi81]

Edit: oh yeah.. to the OP: I think everyone hit on it above.... its sort of the nature of the beast... But peep out the VTC5s.

And i had a feeling that was the case, but as everyone who's done this knows it's worth it And i have seen the VTC5's and i'll be grabbing one to see the difference thanks for the advice.

I am getting me a hades mod for this reason I just got really into the whole parallel coil build and it rips for sure but I can only use it on my now outdated 20watt device or else ill be switching batts every hour, but hey the vape is worth it. cloud on man

Hades? i'll have to look it up and see what it's about, and hell yes the vape is worth it!

 

[tj99959]

Hell with the battery, it's rechargeable. How's your juice supply doing? Once it's gone ... it's gone!








Gawd I love getting 3 hits/drop instead of using 3 drops/hit.

 

[Kalaniboi81]

Hell with the battery, it's rechargeable. How's your juice supply doing? Once it's gone ... it's gone!

Hahahaha very true! I honestly can say i burn a ..... load of juice, but that's okay because i get tired of flavors pretty quick this just helps me cycle them that much faster LOL. I can't say exactly how many hits i'm getting per drip, but i can say it's not very many. Maybe about a hit a drip 1/1.

 

[JDCJDC]

Do I foresee a future seven22 purchase coming up that might get you full days use.

 

[Kalaniboi81]

Do I foresee a future seven22 purchase coming up that might get you full days use.

LOL that things a BEAST! but for $120 it wouldn't hurt to purchase one. Kinda bummed out that it can only fire down to .5 ohms though. I mean that is still AMAZING don't get me wrong, but maybe...just maybe Thanks for the suggestion!

 

[novamatt]

Eh, going below .5 is not really necessary with a high powered device - the whole reason for the low resistance coils is to get high power out of your battery. If you've got a computer system that can get you the power you want instead of getting it from the subohm coil, the only thing the low res coils will do is burn your battery up faster. If a high wattage mod can get you the power you want with a 2 ohm coil, you'll get a lot closer to the battery life you've been looking for.

 

[Kalaniboi81]

Stopped by my local vape shop "Spacevapers" for a refill of juice yesterday and there was a guy there with the Stingray Mech Mod. It holds a 26650 and he was saying that his battery life is about 1 1/2 hours longer than with 18650. It was a tad on the bulky side, but still very sleek looking. If anyone is in the Seattle Tacoma area this place makes there juice on the spot, 100% VG and their flavor selection is huge!