The 72-volt Satiator delivers a max charging current of 4 A; the 48-V version delivers 8 amps. 4 A charging is probably easier on your battery, though, extending the number of charge cycles.
The Satiator is wonderfully programmable for voltages from 12.5 to 72, and various charge levels, profiles, and battery chemistries. . Storing your battery for the winter? Give it a 50% charge. Need max range for the next ride? 100%. Want to eke out max life for that $1000. Battery? 80%. Want to float a 12-volt lead acid battery? No problem. The Satiator does it all! I love mine! It’s a 72-V version. Caution: RTFM! (Read the fine manual). The device is very feature rich, and you want the settings to be correct for the battery you connected to avoid “unexpected results.”