Don't know what kind of charger you have, but I've done several profiles on my Grin Satiator charger:
For my 52 volt (nominal) batteries that are large (over 1,000 wh):
Choice of current: 1, 2.5, or 5 amps
Full Voltage: 55.4v, 57.1, 58.4, and 58.8v (for 80%, 90%, 97.5%, and 100%) I rarely go to...