@turbo1889 Yeah, maybe if there isn't any soldering involved.
But even then, I really don't want to have to put more than a single pair together.

@Jimi77 I did check out highpower for their batteries. I like the lithium nickel manganese mix. more stable voltage across many batteries than lifepo4, which avoids problems with one bad cell.
but as you mentioned, they're pricey. A 63v 12.5ah is over $1,000. that's way too much money for what you get.

so i'll probably stick with a LiFePO4, which will perform well enough anyway.

Like I said in the first post, I like the big series of headway LiFePO4's. There would be a lot less troubleshooting if I wind up with problems than a battery pack with 160 x 18650's or whatever.