Quote Originally Posted by Stevo View Post
I can't wrap my head around the thought of monitoring and balancing all of those little flashlight batteries wired in parallel. I think THAT is a the most difficult part to using 18650's, IMHO.
Assuming you wire in parallel first, and then put those parallel arrangements in series, then you only have to monitor the series components - the parallels behave as one cell. So whether your pack is 1p18s, or 1000p18s, the monitoring hardware is precisely the same.

*VERY* different thing if you're going 18s1000p however, monitoring parallel strings requires a separate BMS for each string.