Everything as pretty much been said about this cell so next step is being able to confirm availability and prices ?
30T and 40T are a good compromise for small packs, and powerful with good capacity btw. It’s all about each max power needs too (take in account ESC and motor limitations).
Again can’t get 120 amps from the 30Q without a lot of sag unless it’s a 6p config. More sag leads to more amps, which leads to more sag, which leads to more amps, and so on.
60 amps is too weak for me 
Define small packs? According to @b264, it’s a 2p. I’d argue that it’s useful in a 3p and 4p config also. Above that, doesn’t make as much sense.
Everyone assuming that it’s only useful for small configs are ignore the less sag and less wear and tear of the cell. It’s not good to pull 20 amps for a 30Q cell for much time. That will shorten their life cycles.
Not saying it’s not useful for bigger packs (keep in mind ESC and motor limitations), if you got the rig it is a beast for a cell.
But to me @b264 said something relevant : I’d literally run them in 1P or 2P packs because of space and weight constraints.
It totally fits my bill as 2x12S1P if I were to replace my current 2x8S2P, as far as power rating goes and I save some space while raising max speed.
Though comparing 32x 18650 cells and 24x 21700 cells, the 21700 comes heavier. It’s all about different needs IMHO.
Lets consider some board options:
4wd, with VESC6, capable of 80 amps per motor, means 240 amps possible.
30Q pack needed: 12s16p, 9216g total 30T pack needed: 12s4p, 3312g total
Another setup:
4wd, with VESC4.12, capable of 30 amps con with bad heatsinks (way more if good heatsinks), that’s 120 amps.
30Q pack needed: 12s6p, 3456g total 30T pack needed: 12s3p, 2484g total
A 12s6p board needs to be almost twice as large. Space wise, the 12s6p 18650 is much larger than a 12s3p 21700.
So for me, as someone designing hollow core decks, my latest design that I hope to have samples in hand for in a few weeks, fits a 12s3p of 18650 or 21700 with space for 4x vescs and a bms. I don’t need much more space for the 21700 cells. So being able to shrink the number of cells I need is huge for me.
That’s not a good comparison though. A good comparison would be 2 packs that are the same amp rating (and watthour) numbers, 32x 20Q 18650 cells vs 16x 30T 21700 cells. In this case, 1536g vs 1104g.
So if your after performance with less weight, the 30T is the winner.
If your after range, than yes, this is a different story. Weight to range ratio on the 30T cell is higher.
But 6-20 miles (depending on weight and how you ride) is enough for most people, especially in a city.
12s4p is big enough for most people in terms of range. 60-80 amps though, is not enough if you want real power.
The other place I see these cells being used is in mountain boards. They need huge amp discharge rates, just like my 4wd boards need, and they will also benefit largely from these cells.
And again, even if 80 amps is enough for you, your 30Q cells are going to last a fraction of the life cycle of the 21700 30t cell in the same config. So even if you don’t need 160 amps, and only 80 amps, your cells will last much longer than the 30Q cells.
If you want a weak performing board, stick with the 30Q, it’ll do fine for you. But if you actually want to increase performance and the life cycle of your cells, the 30T is better.
I’m ignoring cost aspects, so I know that will come up.
Lets add up the costs of these packs.
Lets assume the 30Q cell is $3 per cell and the 30T cell is $7 per cell.
The 12s16p 30Q pack costs $597. The 12s4p 30T pack costs $336.
So performance for your buck here, the 30T is cheaper.
Now we look at my second example, which is more practical.
The 12s6p 30Q pack costs $216. The 12s3p 30T pack costs $252.
So in this case, performance for your buck, the 30Q is cheaper, but not by that much…
Now yes, again, I’m ignoring range. Lets assume at these higher amp draws, the 30Q dies at 2.65 Ah and 30T dies at 3 Ah (As the graph I posted above).
12s16p 30Q is 42.4 consumable Ah. 12s4p 30T is 12 consumable Ah.
And the second example.
12s6p 30Q is 15.9 consumable Ah. 12s3p 30T is 9 consumable Ah.
So yes, if your after range with these high amp ratings, the 30Q yields better results. But these larger 30Q packs need more space and take up more weight than the equivalent amp rated 30T pack to get this range.
If you want high performance with long lasting cells and range, the 12s5p or 12s6p of the 30T pack will be the winner. Long range, high amp rating, and a longer life cycle.
That was my opinion also with the 30T cells for a 12s6p configuration.
So I have these people contacting me asking if I was still in need of the cells. Should I ask for a sample first then?
How about comparing 2 wheel drive boards? Because frankly, I don’t pay any attention to 4WD needs. If you’re making a 4WD board, you can fend for yourself LoL
The vast, vast, vast majority of boards are 1WD or 2WD
Ask them for samples and see if they are any good. If you need a level 3 to do the group buy, I would be fine with doing so. I just want to confirm these cells are legit, since the world has yet to see them supplied to the masses.
In my opinion, 4wd bards will become much more popular in the coming year.
For 2wd boards, lets assume the VESC 6 case, which means 160 amps:
30Q pack needed, 12s4p, 2304g, $144, 10.6 consumable Ah. 30T pack needed, 12s2p, 1656g, $168, 6 consumable Ah.
And the 2wd VESC 4.12 case, which means 60 amps:
30Q pack needed, 12s3p, $108, 7.95 consumable Ah 30T pack needed, 12s2p, $168, 6 consumable Ah (rate to 80 amp instead of 60, since 60 is not divisible by 40)
In this case:
If your priority is minimizing space and weight while maintaining power, the 30T is a better cell. If cost and range is your priority while maintaining power, the 30Q cell is a better cell.
This also doesn’t take into consideration the extra wear and tear done on the cells by running them close to their limits.
I will look more into the life decrease of these cells but the numbers I remember seeing said 1200 life cycles if you only do 10 amp per cell, vs 300 cycles at 20 amp per cell with the 25r. I’m assuming that mostly carries over to other 18650s, since it’s the same battery chemistry. If you take this into consideration, the 30T in a 12s4p vs 30Q in a 12s4p might last 3 times as long. So even price wise, you might be better with the 30t…
I agree with your point for 4WD dragsters and I see your point about my comparison (why compare 12S to 8S) but here I reason in terms of max continuous wattage.
I don’t use 30Q I use HB2 btw (I think we’ve already discussed this) so I’m closer to your setup than mainstream setups seen here.
My Wh figures are also interesting because 2P HB2 = 1P 30T (again 30T might hold the charge longer so maybe a bit less).
I seek minimum 3200W continuous as conservative rating (means : battery should not exceed 80 degrees).
8S4P of my cells = 1376Gr and I can pull the 3200W continuous easy.
16x 30T in 8S2P will give me an average 2350W max continuous so it’s under my goal. I want more.
24x 30T in 12S2P will give me an average 3360W max continuous ! And 24x 30T 21700 = 1656Gr so I still carry 280Gr more. That’s more relevant to me.
Note that a 10S2P brings me a bit under my goal, 3060W average continuous. It weights 1380Gr , 4Gr more.
Let’s be fair and add in equation connecting stuff, because there is much more cells to connect with my 8S4P.
Including connections I’m up at 1424Gr for 8S4P ; I’m at 1687Gr for 12S2P ; I’m at 1411Gr for 10S2P
So I could switch for a 10S2P setup an shave space and 13Gr. But I’d lose an average of 100-200W of max power.
It’s all about choices again.
Edited the 10s2p, previous number was for 1P
8s4p HB2: 8 cells x 4.2 v per cell = 33.6v x 120 (30a per cell x 4 cells) = 4032W
8s2p 30T: 8 cell x 4.2 v per cell = 33.6v x 80 (40a per cell x 2 cells) = 2688W
12s2p 30T: 12 cell x 4.2 v per cell = 50.4v x 80 (40a per cell x 2 cells) = 4032W
The 8s4p of the HB2 and the a 12s2p of the 30T are the same Watt ratings.
This also assumes you can actually get 30 amp per cell from the HB2, and from what I’ve read, 22a is the max you should pull. In that case, you have less Watts than the 30T cell in a 12s2p config.
Figured out were I went wrong my first time.
I see your point, but honestly the range you get from these HB2 cells are half that of the 30T on paper, probably less in the real world.
No problem 
but your maths are still wrong : you take the max voltage and max amp discharge where you should account for voltage sag per cell.
So I average different discharge at and below nominal voltage to get a continuous figure.
HB2 are able to pull 35A under 85 degrees actually and 30A under 78 degrees continuous, for burst it hits harder but since we look for conservative.
Else you’re right, 8S4P of HB2 can hit 4000W continuous if pushing the amps a bit more and so does 12S2P 30T.
I see your point of view.
I think the 30T will be most interesting for 4wd boards where you have extra motor and esc power capabilities. I know I’m gunning for them 
Still, compared to most 18650s, a 12s4p 18650 will have close to the same Watts as a 12s2p of the 30T. Meaning cost is really the only downside to the 30T.
Not doubting, just curious, are you logging the stats of your board and for how long do these massive current last? in a serious hill did you manage to pull 4000 W all the way?
Just wondering if there is anything new regarding your inquiry?
I´m not saying this is legit but it looks better than any Alibaba seller. I found this website that offers Samsung 30T 21700 cells. They are located in Israel tho.
Waiting for his response via Email now. 
