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A. Open-circuit voltage (V)
B. Time (minutes)
C. Charging
D. Ambient temperature 20 °C (68 °F)
E. Check the open-circuit voltage.
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Charging method using a variable-current
(voltage) charger
a. Measure the open-circuit voltage prior to
charging.
TIP
Voltage should be measured 30 minutes after
the engine is stopped.
b. Connect a charged and ammeter to the
battery and start charging.
TIP
Set the charging voltage at 16–17 V. If the set-
ting is lower, charging will be insufficient. If too
high, the battery will be over-charged.
c. Make sure that the current is higher than
the standard charging current written on
the battery.
TIP
If the current is lower than the standard charg-
ing current written on the battery, set the
charging voltage adjust dial at 20–24 V and
monitor the amperage for 3–5 minutes to
check the battery.
• Reach the standard charging current:
Battery is good.
• Does not reach the standard charging cur-
rent:
Replace the battery.
ELECTRICAL COMPONENTS
d. Adjust the voltage so that the current is at
the standard charging level.
e. Set the time according to the charging time
suitable for the open-circuit voltage.
f. If charging requires more than 5 hours, it is
advisable to check the charging current
after a lapse of 5 hours. If there is any
change in the amperage, readjust the volt-
age to obtain the standard charging cur-
rent.
g. Measure the battery open-circuit voltage
after leaving the battery unused for more
than 30 minutes.
12.4 V or more --- Charging is complete.
12.3 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery.
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Charging method using a constant voltage
charger
a. Measure the open-circuit voltage prior to
charging.
TIP
Voltage should be measured 30 minutes after
the engine is stopped.
b. Connect a charger and ammeter to the bat-
tery and start charging.
c. Make sure that the current is higher than
the standard charging current written on
the battery.
TIP
If the current is lower than the standard charg-
ing current written on the battery, This type of
battery charger cannot charge the VRLA
(Valve Regulated Lead Acid) battery. A vari-
able voltage charger is recommended.
d. Charge the battery until the battery's charg-
ing voltage is 15 V.
TIP
Set the charging time at 20 hours (maximum).
e. Measure the battery open-circuit voltage
after leaving the battery unused for more
than 30 minutes.
12.4 V or more --- Charging is complete.
12.3 V or less --- Recharging is required.
Under 12.0 V --- Replace the battery.
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Table of Contents
Troubleshooting
