fantastic summary! Thanks
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In space constrained builds, Iām always wondering if I could test before I commitā¦ I have a VTC5A 13s3p board. Iāll try transplanting it to a hummie deck with avio drives to see what torque/speed is like.
I have a 13s4p 30Q board, maybe I can frankenstein that guy too, but that doesnāt answer any questions.
Like, VTC5A or 40T looks good unless 75A is not enough (unlikely), in which case itās gotta be 30T. Canāt really fit 4p 18650 unless 11s.
Would prefer to keep it EASY.
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for the build evrything above 60A discharge and 12s is plenty. I am now making a new battery 12 or 13s3p with VTC6 because I am going to use the MAD Storm and they need more amp. I tried them at 12s4p 30Q and I was terrified. The current 12s3p 30Q is going to another build.
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OMG I added A123 26650 to the table. I think 15s2p will fit with a nice easy layout. I have a 15s2p powering hummie motors on my favorite build. I have loose cells on hand. Gonna have to test pneumies on it. Sorry hummie build!
How do you drive 15s?
3.3v nominal, similar to 13s.
Ah right. Overlooked at the cell type 
I thought I missed the presentation of a higher s counting ESC
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I can tell youāre thirsty for it. 
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Yeh an ESC capable of 16s would save me the extra time to make a 14s battery first and then upgraded with a 2s extra pack once the Esc is out.
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@Sn4Pz I added Molicel P42A 21700 to the table
The 13s2p is not bad. 30A is the continuous discharge rating, but it can do 40A with temperature monitoring. 393wh for 2p with ~70A discharge. I forgot what your requirements are.
P42A 13s2p 60A 393.1 EASY 30A discharge 4.2ah/cell
Ah I should mention for others in the thread, in the US the P42A is $5/cell until 2/4.
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I have seen these cells. Donāt know anyone that used them for out purpose. The specs are really good.
For me everything >= 60A discharge is good
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KfromtheBay found the flash sale. Iāve been blabbering about it in the battery builders thread. The discharge curve at 30A is interesting. Voltage drops real quick initially, then levels out. Much flatter than most cells, but you lose that kick of a pack just off the charger.
For me, 13s2p of these is in the running, along with 15s2p A123 and 13s3p VTC5A. And 13s2p 30T which are also on flash sale, but the range is much nicer with these P42A.
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Added LG HG6 to the table. On crazy sale at $2/cell. 20650, so 20mm, which fits 9 wide in 180mm. Probably more like 20.1mm, which is 180.9mm at 9x. Should be easy 12s3p or 13s3p. Same/similar wh as 30Q but 90A vs 60A.
Dammit these guys burned me on the molicel flash saleā¦
I bought 13s2p worth of P42A, which has more capacity than 13s3p of these guys, and 60A should be enough. Butā¦ Maybe the 1mm height difference makes a difference?
Mr. @Sender do you think 21700 or 20650 will fit in the cavity?
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For the price and the bench test resukt I have see in not bad if the larger format is not a problem.
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Interested to see what kind of range drop youāll see running 50% more amps. My guess is it is going to be soLow.
I hear you, but most likely itāll be running way below max, so effectively vs 30q or vtc5, itāll just be less sag, more cycle life, a bit more run time. Maybe.
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I finally chopped up my hummie build and did a test. Avio mk1 AT with bergs, and the 15s2p A123 M1A pack. I charged it full, 220wh went in. vesc cutoffs kicked in at 178wh drained, 6 miles. 29wh/mile. 6 miles is not great lol.
So itās gonna be one of these
How is it these 2 packs have almost identical watt-hourā¦ Most likely the HG6 if it isnāt too hard to fit.
Letās see, I got 178wh usable out of 220wh, so 81%. For the 393wh packs, 80% is 314wh, which is just over 10 miles estimated. Acceptable.
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pictures or didnāt happen
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