Thanks for the info..
Yeah I know.. I post and read a lot.. Love to learn all I can about E-Bikes.
So.. dropping to 31 volts ( mine is rated at 31.5 ) will be real bad for a lithium 48 V? I just assumed from 52 to 31 would mean a lot of voltage would have to drop before my controller cut out and that sounded like a good thing - means increased range.. But I guess there is something here i'm still not getting.
Also i read about sag - how do amp hour ratings effect this? I have 3, 12 V in series for 36 at 12/AH now.. should I get a battery that's got more AH?