Could you use an 18340 cell, and how?

[Ginseng]

The question has been raised in two threads in the last year here and here. The impetus is to make use of the greater room afforded by 18 mm-cell (18650) bodies but retain the compactness of the CR123 cell length. The main objective would be to provide increased capacity over existing R123s.

The purpose of this thread is to gather information about the potential applications and market size to see if we can suggest to battery makers (such as AW) that this is a worthwhile product to produce. Please respond to the poll as to whether or not you think this cell would be of use and post your prospective application.

Wilkey

Edit. Oh heck, would this be more appropriate in the Batteries forum? If so, please move it on over, guys.

 

[Ginseng]

I'll get things started. I voted yes and my application would be a Malkoff M60 drop-in in a Dereelight CL1H.

Wilkey

 

[Bullzeyebill]

+1 Wilkey. Might be able to get a real 1000mAh rating with that configuration. If you have read SilverFox's LiIon Shootout, you will notice that we are not seeing much more than 500mAh at 1 amp draw using the 16340's, maybe a little more with Powerizer's RCR123's 3.7-4.2 volt cells. I use Powerizer RCR123's exclusively, monitoring then closely. I am using them with an older Q2 Malkoff M60 in a 6P, or G2Z.

Bill

 

[schiesz]

I could definitely use 3-4 of these.

schiesz

 

[JasonH]

I'll get things started. I voted yes and my application would be a Malkoff M60 drop-in in a Dereelight CL1H.

Wilkey

Same reason as Ginseng here, I'd probably use 4 of them maybe 6.

 

[harddrive]

+1

In Leef 1 x 18650 body with LF EO4 or Malkoff M60 or BOG dropin.

 

[Bullzeyebill]

My application(s) would be my Malkoff drop-in in one of my TB 18650 bodies, or my KL6 in one of those bodies. Any buck regulated head or drop in that works with a Surefire bezel/body. We might need to see some 1X18340 bodies from some of our body builders for buck/boost setups.

Bill

 

[rizky_p]

i am in for one....

 

[bullterrier]

I voted yes and my application would be a Malkoff M60 drop-in

 

[Tronic]

My use wold be a WE Sniper with LF HO-9 Lamp.

 

[DM51]

I'm moving this to the batteries section.

 

[Illum]

I'm interested
don't know what light can be used but I'll worry about that later. We must have the cell to work with first

 

[fasuto]

My use wold be a WE Sniper with LF HO-9 Lamp.

Some here but how many mA will have this batteries?

 

[lasercrazy]

I would use 2 of these in my lumapower M1.

 

[Tronic]

Some here but how many mA will have this batteries?

I am expecting around 950mA.
That would be about 30min runtime for the above configuration.
Small but powerfull!

 

[Ginseng]

I'm going to send this thread's URL to AW just to let him know that there is interest. I think to really make the case, we'd need to ask him for an estimate as to the capacity and current capability of these cells. The reason I asked what you would use it in is to get an idea of the number of potential hosts and applications that would amend themselves to this cell.

Wilkey

 

[mdocod]

If they were 1AH or better absolutely. EO-9s in 2xCR123 length bodies YAY! Or even just more safely running the HO-9 with better output and runtime would be worth it!

 

[AW]

Wilkey,

The capacity of a cell depends on how much of electrolyte and separator roll ( increased surface area ) you can stuff into it. In the case of a 16340 to 18340, the 2mm diameter difference will only increase the capacity by approx. 15% ( under 1C load ) because the vent/PTC components take up 5mm of the total cell length. For longer cells such as 18500 vs 17500 / 18650 vs 17670, the capacity increase is approx. 35%. This is the same reason there is not much capacity difference between 16340 and 17335 cells ( both being marketed as R123s ). I don't really think it is worth the extra costs to fabricate a new cell casing for a mere 15% capacity increase.

Regards,
AW

I'm going to send this thread's URL to AW just to let him know that there is interest. I think to really make the case, we'd need to ask him for an estimate as to the capacity and current capability of these cells. The reason I asked what you would use it in is to get an idea of the number of potential hosts and applications that would amend themselves to this cell.

Wilkey

 

[schiesz]

Damn. Oh well, thanks for your contribution AW. At least we know WHY these haven't been done before.

schiesz

 

[Tronic]

Thanks for clarify this AW.
A increase of 15% on top of the currently available 16340 with 750mAh would only be 860mAh for the 18340 cell.