Vapcell 16340 1100mah ??

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notice it is an UnProtected Flat Top Battery..

what make and model of light do you have?

do you know if it works with flat top batteries?

do you know if your light can use UnProtected batteries?
 
Thanks Jon, I’m sure my HDS’s use them. I was trying to comment that the capacity has doubled for this battery in less than 10 years.
True! I have to use protected button tops within about a cigarette paper of 34mm flat, but the ones I get now are 950 rated (and test close to that), and 10 years ago I was lucky to see the 6-700 range with those. It's good that with everything that's getting worse, at least some things are improving!;-)

Cheers!
 
Thanks Jon, I’m sure my HDS’s use them. I was trying to comment that the capacity has doubled for this battery in less than 10 years.

I agree, the 1100mAh capacity of the Vapcel T11 is amazing for a 16340. Double the capacity of 16340 when HDS first came out.. 1100mAh is still 18350 territory.

The HDS works with flat top unprotected.. so.. the T11 may be worth a buy and try. I have not seen any reviews of the Vapcell T11 yet, and it is not listed at stateside sellers like illumn or LiIon wholesale yet..

I see it listed on the Vapcell site atm, and the price is high, at about $12.. the only other site I find the T11 atm is Alibaba. They are accepting inquiries for 25 or more units at a time.

You seem to have found a new product announcement.. thanks for pointing it out.
 
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950 'rating' is about the current par number.

I've been using a bunch of Nitecore NL169s in rotation for about a couple of years now, and they're holding up reasonably well. Here's a few examples of some actual test numbers. Note that all these measurements were to discharged to 2.8V rather than the 2.5V most of the manufacturers use, all are protected cells which are very short for their type, and are rated at 3A continuous discharge current:

When I tested them initially they looked like this:

Screen Shot 2026-07-03 at 8.27.50 PM.png


I re-tested some after ~ 18 months of use in rotation, and they looked like this:

Screen Shot 2025-04-24 at 6.35.01 PM.png



I recently tested a couple and compared them with a current Keeppower cell, and that looked like this:

Screen Shot 2026-03-08 at 7.01.49 PM.png


EDIT: These are the KP16340 I tested. They list both the rated typical and minimum capacity, which is a good thing:

 
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Addendum:

FYI: These are the KP16340 I tested in my last post above. They list both the rated typical and minimum capacity, which is a good thing. Note the length. If you need something short, these are worth considering:

 
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