Late to reply to this, but for anyone in the future who sees this, pick linkdata 65p, or reliance RS60. If unavailable, pick reliance rs50
the best high amp batteries are:
Reliance RS60 (nearly impossible to get right nownow but huge capacity and good Continuous Discharge Rate.
Reliance RS50 (my preference for high amperage batteries)).
Amprius 50Q (I wouldnt pick this because it has relatively poor cycle life)
Tenpower 50xg
Ampace JP50P1
Eve 50PL
However, for an ebike battery pack, even a 36V one probably won't go above 25A per cell (900W), so pick cells with the most capacity
With a CDR of above 30A.
Linkdata 65P
Reliance RS60
Linkdata 60P
Id just pick the cheapest of them. Though i recommend not buying from AliExpress, find a trustworthy battery shop online. You definitely dont want fakes