As you can tell, this board is being built for high speed and distance. I should be able by my calculations get to around 34 mph on flats with hummies hubs, and with a 13.2 Ah battery, I’m expecting around 15-20 miles range. with the 15 Ah battery, 20-25 miles range. The 16 Ah, I expect could be around 28 mile range. But I also have a lot of hills, so my real numbers may end up being far less.
The multi star are out… They simply take up too much space.
so…
LG HG2 3 Ah lion cells (12s5p, 60 cells total, 100 amp max con, 15 Ah)
or
Zippy Compact 2.2 Ah lipo cells (12s6p, 24 packs total, 150+ amp max con, 13.2 Ah)
or
any other options that fit these dimensions and give some room for power switch, wiring, and other miscellaneous things???
I really have about 535mm total in length in each one. take off 219mm for a vesc on each side, and that leaves about 317mm for battery space.
I updated the image to reflect this. I only have space for 17 cells per slot, or 34 total (I can squeeze 2 more in on the side to get 36). Way too few. But a 12s3p is too small, would only be 60 amps max.
If I do it sideways, I can fit 20 per slot, which is only 40 total. Not enough as far as I’m concerned, I might be able to fit 8 more in next to the vescs, but that still leaves me at 12s4p, 80 amps max, which I don’t think will be enough.
I was originally planning on tucking them up close to the trucks under the board, as that’s what hummie does and it works great. But I forgot that he doesn’t have the heatsinks I have, which add bulkiness. Maybe I could do without the heatsinks, since I’m running 4? I wanted to keep the entire board very clean looking. I had put a layer of fiber glass on the bottom, but I don’t really like it and am going to rip it off and put another layer of wood to cover the screw insert that hold the lid down. I wan to keep it all wood.
Thanks for the idea about putting them on top, didn’t think about that, since your feet are never going to stand there anyways. The only thing is it kills the looks But then I could keep my 16 Ah multistars
yeah it kinda sucks to have put all the effort into making it all internal and the have to mount them on top. but you have done a pretty nice job so far so Im sure you can make a couple of nice little boxes to go on top that will not spoil the looks too much.
I’m trying to see if theres a way I can fit more in. One option would be to add a few more layers.
Right now, I have 17 layers (3 base + 14 hollow). If I can stack the 18650 cells in eachothers grooves and do 2 layers, this would work. But I need to calculate how many more layers I would need. The good thing is, Its acctuall 22.225 mm’s deep, and the 18650’s are 18.35mm diameter. So I need to figure out what hieght I would need to stack a second row in the grooves to see if that’s an option.
I could also do 20 of those zippy compact 2.2 Ah batteries instead of 24, which would know 1 p off and make it a 12s5p, with 11 Ah instead of 13.2 Ah, and then they would all be inside. But again, I don’t know if I’m overlooking anything.
I have so many options:
Mount underneath without heatsinks, maybe move the caps up to reduce footprint
I’m not entirely sure if you just linked the motors to show that motors with built-in ESCs exist, or you proposed using them.
But I don’t think multistar offers motors with the built-in esc in large enough can/power sizes to use in an E-board and the motors aren’t built for hub motor use (axle and can not supported well enough) + the polyurethane attachment is another challenge.
But then I could keep my 16 Ah multistars 
(Mic drop)
I might consider using them…