3 - 117INSPADJELECTRICALCharging method using a variable voltage chargerConnect a charger andammeter to the batteryand start charging.Is the amperage higherthan the standard charg-ing amperage written onthe battery?NOYESCharger AmmeterAdjust the voltage to obtainthe standard charging amper-age.Set the timer to the chargingtime determined by the open-circuit voltage.Refer to “BATTERYINSPECTION AND CHARG-ING” section.Adjust the charging voltage to20 ~ 25 V.Monitor the amperage for3 ~ 5 minutes. Is the standardcharging amperage exceeded?NOYESIf the amperage does notexceed the standard charg-ing amperage after 5 minutes,replace the battery.If the required charging time exceeds 5 hours, it is advisable to checkthe charging amperage after 5 hours. If there is any change in theamperage, readjust the voltage to obtain the standard charging amper-age.Leave the battery unused for more than 30 minutes before measuringits open-circuit voltage.12.8 V → Charging is complete.12.0 ~ 12.7 V → Recharging is required.Under 12.0 V → Replace the battery.Leave the battery unused formore than 30 minutes beforemeasuring its open-circuit voltage.Set the charging voltage to 16-17 V. (If the charging voltage islower, charging will be insuffi-cient, if it is higher, the battery willbe over-charged.)NOTE:NOTE:Measure the open-circuitvoltage prior to charging.
