Looks like we’re out of luck. Convoy has about 3000 6800mah units left, then we’re stuck with the 6200mah Vapcells.
https://alofthobbies.com/products/qb26800-6800mah-3-7v-li-ion-flat-top-battery
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Glad that I stocked up when I did. It sucks for the format as a whole, though. Maybe something else like the 46980 will take off a bit in its place.
If the Vapecell model also dries up, I hope we can get someone to make some spacers for our 26800 tubes. I like my D4Sv2 and M3-C lights a lot more with the extra handle real-estate.
I also grabbed some spare cells back when Aloft had them in stock though.
Pretty easy to. Get an aluminium cylinder of the right length and diameter, then glue it inside a 3d printed sleeve.
21700s have better performance anyway, I’ve wanted an easy way to run 21700 inside 26800 tubes without having to stack Simon’s adapters for ages.
Username checks out.
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But sadly are no match for a 26800 in capacity. The very best 21700s are 5.6-5.8Ah in capacity and only can drain at 10-15A, where a nearly-7Ah 26800 is fine at 20-25A.
I wonder if some manufacturer will get more of them made, like how fireflylite got the 22430 size into existence.
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I would like to think someone will produce something equal or better. Batteries have gotten better through the years, no?
I never hopped on the 26800 train. It was pretty clear to me they were a “weird size” and I’m not surprised by the news. After the old good PB55A (if I’m getting that right) 26650s got discontinued I got jaded. 21700s are pretty clearly a major format and 18650 of course is still going strong. For putting a light in my pocket, compact 18650 models are nearly all I can tolerate. Occasionally I’ll toss the SC700d in. I’ve never pocket-carried a 26650 light.
I’m not really impressed with the weird semi-proprietary sizes. Fireflies 22-whatever and there was a weird size that Amutorch put in some of their models, too. It just gives me the stinking feeling that I’ll never get a replacement, especially 5+ years out when the cell really needs it.
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Neither was I, why do you think I stocked up? 
As someone already mentioned, they haven’t beaten the 26800 for capacity yet. My ideal scenario would be a 26800 with 21700 chemistry. For me, my D4Sv2 is damn near a perfect light with the 26800 tube. If Hank redesigned it with a 21700 tube I actually wouldn’t like it as much–that’s how much I like the form factor.
Regarding a cell adapter, I was thinking more like a 3D printed sleeve with a heavy copper core, to both maximize performance and also preserve the balance of the lights. My Convoy L7’s balance is perfect with 2 26800 cells. It would probably be front-heavy with two 21700s. Actually, I’d probably prefer an adapter for 26650 for that light.
A 26800 or 26650 with the magic jelly inside a P45B, Molicel please!!
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I’d like to see two variants of the 26800. One with the P45B magic, the other with the F60 magic. The “F60 magic” version should be very nearly 9800mah if it provided the same mah/g in the 26800 format as it does in the 21700 format.
Same. The best use I found for them was in a Convoy L7 which was more for their length and weight for bonk light purposes than because I wanted high capacity.
I find the 26800 format more useful just because a 21700 with some spacers will fit in a D4S 26800 tube for more power than a 26650 than I do in terms of capacity 
CDR? Sure, some of them do. However, there are no 6800 mAh 21700s.
Also, I have very large hands, so I appreciate the thicker and longer battery tubes that 26800s necessitate. I would own a Catapult Pro right now if it accepted 26800…its 26650 body left my pinky hanging in the air because it was too short. Same with the D4SV2 and DM11…but the fact that there’s a 26800 tube for them corrected the bad ergonomics, and I own one of each.
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Can Simon ship batteries without a light?
Even without that, there’s already 5800mAh 21700s that are known to work very well (LG M58T). I’d be very happy with 9Ah in a 26800, or even 8Ah if it can sustain 20A
Buy extras for yourself now!
Store batteries in regular use at 80% charge and they will last many years.
I am still rocking my 10+ year old 4500mAh 26650s i bought for my first LED flashlight (Cyclone C88).
New batteries make sure they are above 3.5V and don’t use them, they will last many years with little to no degradation until you need them.
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I just got a new charger that does capacity testing, handles 26800s, and can discharge/charge to storage voltage. I am slowly working through all of my batteries (not just 26800) and doing a full capacity test, then marking the battery with the following:
Measured Capacity
Max CDR
Internal Resistance
Test Date
Those that will be used regularly will be kept at full charge. All other cells will be discharged to ~3.7v for long term storage.
I tested the 26650s last year and they were almost exactly the same as the last test maybe 5 years prior.
That said i only put a handful of cycles on them a year these days.
can discharge/charge to storage
What charger is this?
Xtar VC8S
It even fits 4 x 26800 QB batteries at the same time. I am hoping the Convoy batteries will fit in it as well.
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Can you choose 4V charge on this charger?