My understanding is that you can force a recalibration of the SOC display by running the motor until you get the LVCO error. In practice, this is awkward because the system then shuts itself down until it is charged. I have done it by going up a steep hill near home when the battery was getting towards the end of a charge, but I can't say I noticed much difference. I suppose you could do it on a stand, but it would take some time to run the battery down if the motor was that lightly loaded.