Translations:KAVAN Smart PRO Opto ESCs - Instruction manual/168/en
From KAVAN RC Wiki
Power on - the capacitance is reset after the controller initialisation. However, the capacitance from the previous run will be displayed initially until you start the motor.
Voltage change - the capacitance is cleared when a battery with a similar (or higher) voltage, compared to the maximum battery voltage from the previous run, is connected. This means that every time you connect a fully charged battery of the same composition and cell count, the capacitance will be cleared.
Manual - capacitance and energy are never reset and you must reset them manually.