6
Operation
Common Cautions
• When a cold battery [of about 32 °F (0 °C) or less]
is to be charged in a warm room, leave the battery
in the room for at least one hour and charge it when
it has warmed up to room temperature. (Failing to
do so may result in less than a full charge.)
• Cool down the charger when charging more than
two battery packs consecutively.
• Do not insert your fingers into contact hole, when
holding charger or any other occasions.
To prevent the risk of fire or damage to the battery
charger:
• Do not use power source from an engine generator.
• Do not cover vent holes on the charger and the
battery pack.
• Unplug the charger when not in use.
Note: The battery pack is not fully charged at the time
of purchase. Be sure to charge the battery before use.
Charging the Battery
1. Plug the charger into the AC outlet.
Note: Sparks may be produced when the plug is
inserted into the AC power supply, but this is not a
problem in terms of safety.
2. Slide the battery dock cover back to allow inser-
tion of the battery pack. Make sure the cover is
locked securely in place.
3. Insert the battery pack firmly into the charger.
To AC
outlet
4. During charging, the charging lamp will be lit.
When charging is completed, an internal elec-
tronic switch will automatically be triggered to
prevent overcharging.
• Charging will not start if the battery pack is
warm (for example, immediately after heavy-
duty operation).
• The orange standby lamp will flash until the
battery cools down. Charging will then begin
automatically.
5. The charge lamp (green) will flash slowly once the
battery is approximately 80% charged.
6. When charging is completed, the charging lamp
will start flashing quickly in green color.
7. If the temperature of the battery pack is 32 °F
(0 °C) or less, charging takes longer to fully
charge the battery pack than the standard charg-
ing time. Even when the battery is fully charged,
it will have approximately 50% of the power
of a fully charged battery at normal operating
temperature.
8. If the temperature of the battery pack falls below
approximately 14 °F (−10 °C), charging automati-
cally stops to prevent degradation of the battery.
9. If the power lamp does not light immediately after
the charger is plugged in, or if after the standard
charging time the charging lamp does not flash
quickly in green, consult an authorized dealer.
10. If a fully charged battery pack is inserted into the
charger again, the charging lamp lights up. After
several minutes, the charging lamp may flash
quickly to indicate the charging is completed.
