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Measure the battery voltage by using the multi circuit
tester.
If the voltage reading is less than 12.4 V, charge the
battery with a battery charger.
NOTE:
• For charging the battery, make sure to use the
charger specially designed for MF battery.
(If there is not MF battery charger be charged
from current and time described in the battery)
Otherwise, the battery may be overcharged
resulting in shortened service life.
• Do not remove the cap during charging.
• Position the battery with the cap facing upward
during charging.