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CHK
ADJ
Charger
Ammeter
Measure the open-circuit
voltage prior to charging.
Connect a charger and am-
meter to the battery and
start charging.
Is the amperage higher than
the standard charging am-
perage written on the bat-
tery?
Charging method using a variable-current (voltage) charger
TIP
Leave the battery unused for more
than 30 minutes before measuring its
opencircuit voltage.
TIP
Set the charging voltage to 16-17 V.
(If the charging voltage is lower charg-
ing will be insufficient, if it is higher,
the battery will be over-charged.)
Adjust the voltage to obtain the
standard charging amperage.
Set the timer to the charging
time determined by the
opencircuit voltage.
Refer to “CHECKING AND
CHARGING THE BATTERY”.
Adjust the char ging voltage to
20 ~ 25V.
Monitor the amperage for 3 ~ 5
minutes. Is the standard charg-
ing amperage exceeded?
If the amperage does not ex-
ceed the standard charging am-
perage after 5 minutes, replace
the battery.
If the required charging time exceeds 5 hours, it is advisable to check
the charging amperage after 5 hours. If there is any change in the am-
perage, readjust the voltage to obtain the standard charging amperage.
Leave the battery unused for more than 30 minutes before measuring
its open-circuit voltage.
12.8 V J Charging is complete.
12.0 ~ 12.7 V J Recharging is required.
Under 12.0 V J Replace the battery.
YES
NO
NO
YES
CHECKING AND CHARGING THE BATTERY
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