Stacking 2 18350 Battery Question

[ROM 1]

If I stack 2 18350 batteries (Ultrafire batteries) in my mod, will the voltage power increase? Will my vaping time also increase, since there are 2 batteries? Thanks!

 

[OlDogNewTricks]

Stacking the 18350 would yield 7.4 volts (each 18350 is 3.7 volts). This will yield a higher wattage across the same resistance, but at high drain, they would heat up very fast. Add in the extra connection (battery to battery) and you could end up with more problems. A number of videos that I have watched have shyed away from that setup as potentially dangerous. YMMV

 

[Dougiestyle]

If you do this, please only use protected batteries. In an unregulated mod, if you stack batteries and there is a malfunction there a greater risk for catastrophic failure.

No, your battery vape time will not increase. You will have the same mAh, but double the voltage.

The only time more than one li-ion battery should be used is when there is a protection circuit built in.

There is an inherent risk that your batteries could explode. You have been warned.

 

[Nev NYC]

If you're going to use stacked 350's always use them as a pair. You should also mark them and switch positions with them between cycles. Always make sure they are charged equally. Using stacked batteries will allow you to get more accurate voltage/wattage at higher settings.


Sent from my iPhone using Tapatalk 2

 

[Choc_Addic]

Please do everyone a favor and do not stack batteries.

If you understand the "Balanced charged pair, balance discharge, reverse charging and venting" then you can. In addition I would not even use any XXXFIRE brand/non-branded batteries anywhere near my face! (Not that it's pretty ;-().

Cheers.

 

[jka3588]

Assuming it's from the higher starting voltage, but I get way better battery life out of stacked 18350's than I do a single 18650. If I had more room on my charger I probably would have switched to 18350's on all my mods.

 

[Baditude]

Please be aware that the "fire" batteries (Trustfire, Ultrafire, Surefire) are a second tier of brand name batteries in terms of quality and safety. Stacking batteries has never been advocated by any battery expert, as you can find for yourself in the battery resource guides listed as references in my battery guide below:

Battery Basics for Mods: IMR or Protected? - http://www.e-cigarette-forum.com/forum/blogs/baditude/3295-2-sample-list-vendors-selling-pre-punched-single-coil-cartomizers-cartotanks.html

 

[Coastal Cowboy]

Thank heavens you asked before doing it.

The fact that you asked whether it was a good idea indicates that you probably don't have the requisite experience to safely use those batteries this way. As Baditude pointed out, the *fire batteries aren't top of the line, but even high quality batteries used improperly can be dangerous.

Mods are "advanced personal vaporizers," and because the number of variables affecting risk go up by an order of magnitude when switching to one of these devices, you have to do some homework. You've found the best resource on the planet for doing that homework. ECF is where it's at.

Also, we need more information about your setup. What mod is it? What kind of atomizer are you using?

 

[tj99959]

My question would be what are you trying gain, or what problem are you trying to solve? If it's just how long can you vape on a charge, then parallel batteries would double the MaH, stacked batteries only double the voltage. Two stacked 18350's fresh off the charger would read 8.4v, and you would be hard pressed to find a topper that could handle that.

When it's all said & done, why would you want to stack batteries when it isn't necessary? With our modern technology anything that can be done with two batteries can be done with one.

 

[ROM 1]

Thanks for the great info. I will definitely not stack, but instead get a bigger battery, such as the 18650.

 

[ROM 1]

I am currently using a KTS telescoping mod and Ultrafire 1200mah batteries. I don't plan on stacking 2 18350 batteries in them due to the safety issues that you guys mentioned. Thanks so much for letting me know.

 

[pocket]

Stacking the 18350 would yield 7.4 volts (each 18350 is 3.7 volts). This will yield a higher wattage across the same resistance, but at high drain, they would heat up very fast. Add in the extra connection (battery to battery) and you could end up with more problems. A number of videos that I have watched have shyed away from that setup as potentially dangerous. YMMV

I recommend not stacking ever. You will only have more problems like how OlDogNewTricks stated..

 

[durianeliquidflavorplease]

Even Fasttech has reminders on the page of every mechanical mod to not stack batteries.

 

[ROM 1]

You're right. I guess the reason why I asked was because the description on this KTS mod stated that 2 18350 can fit in this mod, which led me to believe that stacking was normal for this mod.

Here is a description from the Fast Tech website regarding this product:
Details:
•510 thread, suitable for 510 series atomizers
•This battery compartment is compatible with 1*18650 or 1*18500 or 2*18350 batteries (batteries not included)

Here is the link just in case you want to double check: $17.08 KTS E-Cigarette Mod / Battery Compartment - brass mod at FastTech - Worldwide Free Shipping

Anyway, regardless of what the number of batteries this KTS Mod is able to carry and handle, I am sticking to one battery.

 

[Cool_Breeze]

Contrary to a previous comment, stacking two batteries will decrease the 'drain' (current consumption) by nominally half for a given power output at the coil...assuming the mod is built to accommodate the higher voltage supplied.

Connecting two batteries in series does not double the available capacity in terms of mAH, rather that remains the same and the Voltage is doubled. With double the voltage, the available power is increased. The higher voltage makes available more potential power and allows operation at lower current rates (drain). Higher Voltage allows for use of higher resistance which also which effectively lowers the drain.

Two 18350s will run significantly longer than a single 18350 as the higher voltage allows for a lower current demand.

The overall capacity of a 2 - 18350s at 1200 mAH is the same as a single 18650 at 2400 mAH.

Every device I use (4 of them) utilizes two 18350 batteries in series.

I've had no problem with any 'Fire' batteries I have used.

 

[Baditude]

I guess the reason why I asked was because the description on this KTS mod stated that 2 18350 can fit in this mod, which led me to believe that stacking was normal for this mod.

I don't know why FastTech does that.

They also sell unprotected Li Ion batteries alongside protected Li Ion and IMR Li Mn batteries. Make sure when purchasing batteries from FT that they are either protected or IMR. Unprotected Li Ion batteries have NO PLACE in vaping.

There are three options for an 18500 battery at FastTech. The first is an "unprotected Li Ion" battery (actually Li Cr) which is inappropriate to use in any mod.
http://www.shareasale.com/r.cfm?u=595545&b=437122&m=44775&afftrack=&urllink=www.fasttech.com%2Fcategory%2F1420%2Fbatteries%2FMTI1PTE4NTAw%2F

 

[jazzbo]

I've used stacked 18350s in my Vamos from day one with no issues whatsoever; I do insure that they're in good working order, that they are equally charged, not damaged, etc. There is a risk in using *any* battery when push comes to shove, as catastrophic failure can and will occur at any time with *any* battery.

 

[Nermal]

^^ Sure, but we have a certain amount of control over how much risk we accept in exchange for any given increase in benefits. What benefits do you perceive in stacking?

 

[jazzbo]

One of the benefits is that the only way a Vamo will achieve power settings over about 12.0 watts is with stacked 18350 batteries. Another is the fact that current drain is lower meaning cooler running batteries at the same power setting compared to an 18650.

 

[jazzbo]

Contrary to a previous comment, stacking two batteries will decrease the 'drain' (current consumption) by nominally half for a given power output at the coil...assuming the mod is built to accommodate the higher voltage supplied.

Connecting two batteries in series does not double the available capacity in terms of mAH, rather that remains the same and the Voltage is doubled. With double the voltage, the available power is increased. The higher voltage makes available more potential power and allows operation at lower current rates (drain). Higher Voltage allows for use of higher resistance which also which effectively lowers the drain.

Indeed. 2 stacked 18350s running at 11 watts in my Vamos run far cooler than a single 18650 at the same 11 watts.