Thanks for the review!
1 Thank
Nice! The question is whre can you buy these or will they be as unontanium as the 50S?
As mentioned above, I don’t know. 
I’m confident that quite a few vendors will eventually stock this cell.
Samsung actively works to keep their cells out of the hands of end users. E-One Moli supports the use of their cells by individuals and I think these cells will (eventually) be widely available.
Any vendors stocking them will sell out instantly though. It will take a while before enough demand has been met for the vendors to actually keep stock on hand.
Thanks. Probably keep an eye out for them, but you’re right…will probably be sold out quick like P42A. I hope they don’t cost $25 each like the Vapcell 50S.
Don’t think so. I’m sure the P45B will cost more than the P42A but I’ve seen reasonable wholesale price quotes so I’m hopeful they are priced kind of reasonably at retail. Well…eventually.
I hope so. These seem like awesome cells. I have some P42A, but I am liking the 40T better in my high performance flashlights. Hits harder at start and maintains higher output for 15 minutes or so at high current.
Hey Mooch, good to see you! These sound like little powerhouses. Maybe when the e-bike folks eat their fill, maybe some tool manufacturers, they’ll trickle down to where we can buy them easily.
Side note…your review on the QB 26800 was great and a lot of us here and on reddit have been very pleased with them. There were restocking/supply issues for awhile, and during that time more of the green/blue wrapped 26800 mystery cells were sold and/or included with some lights. Still some questions but we know enough about the QB to be satisfied. Do you know anything about those green or blue cells? Any chance you’ll have those in the test queue? (Heck, for that matter, do you know the actual manufacturer of the QB cell or those others? Wondering if they’re the same cells/same manufacturer.)
Big thanks for all the time you spend testing for us. You and HKJ keep us going!
The blue/green (I have a green from Nealsgadgets) are shorter than the QB by 1.5 mm or so and have a higher current rating possibly. The Ni03 I tested on the green cell pulls 28 amps, but the QB gold one only about 24 amps. Maybe because it was new vs the green having about 4 cycles on it, but the green seems to be a higher drain cell.
Hmm, interesting…so not the same cells then. This could be a good thing in the end. Thanks, Sirstinky.
Sorry, I don’t know anything about those other 26800’s and none are in the queue (no requests yet). I’d take the time to test them though if anyone wanted to send me two of each.
Cost might be problematic just due to shipping them individually (i.e. not inside a device) from Asia, but if something can be worked out I’d sure chip in. I’ll put a post in our main 26800 thread here, maybe it can happen.
These new 21700 are really impressive. Cells seem to have plateaued for the most part and then boom, driven by industry we suddenly see some real gains!
I’d be very interested in this review. Would you have a link?
‘r/mooch’ shows nothing, ‘QB26800’ has many hits, none regarding his review.
I can’t guarantee they haven’t changed what cell they are wrapping but here’s my test report:
After much digging (“mooch315”), and finding your review some umpteen pages (been over a year), finally got to that linked forum.
Many thanks, I’ll dive in…
Yea, I reallllly need to get my web site up and centralize everything, indexed, with search, etc. LOL…in my copious spare time.
As I have your attention, perhaps enlighten me. I’m into designing my own builds and balancing cell discharge to LED current demand. The newer LEDs are power-hungry.
Trying to interpret those current graphs, they are in Amp-hours (capacity). I’m looking for sustainability (my preferred would be 3 minutes) and at no less than 3.6 volts (battery sag). These LEDs don’t perform at their peak below 3.6 volts, many at 3.8 volts (I’m disregarding those above as inconceivable to attain such with 20+ amps draw).
So how do I calculate or interpret those graphs?
Choose the discharge current level closest to that at which you are operating. Then follow the discharge curve plot line down to your cutoff voltage, 3.6V or 3.8V or whatever you choose. Whichever cell(s) deliver the highest capacity at that cutoff voltage will be the cells that give you the longest run time.
Odds are that the cells running for the longest down to my 2.8V cutoff will also be the ones running the longest down to a higher cutoff. You could use these tables to narrow down your choices:
If HKJ has tested any of the cells you’re considering he has a much wider range of discharge current levels you can check for highest delivered capacity at your cutoff voltage.
That’s what I’ve been doing, but how to translate Amp-Hours to minutes?
Example:
Ah is just amps * hours.
Convert the delivered capacity in mAh to Ah (Ah = mAh / 1000). Then divide the number of Ah by the current (amps) and you’re left with hours. Then you can convert to minutes. Since the discharge is constant-current you can do this.
You can do this directly using mAh and minutes but you need to handle the units carefully. I leave this as an exercise for the reader.
That’s the maths I’ve been doing. As per the above example:
0.73 AH ÷ ~8 (estimated) ÷ 25 A = 0.004 Hours x 60 = 0.219 minutes (~13 seconds)
I’ll reverse engineer the graph so to what current can be sustained 3 minutes.
With some fiddling, about 18 amps.