Operation
Common Cautions
• When charging a cool battery pack [below 32 °F
(0 °C)] in a warm place, leave the battery pack
at the place and wait for more than one hour to
warm up the battery to the level of the ambient
temperature. Otherwise, battery pack may not be
fully charged.
• 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. Insert the battery pack firmly into the charger.
• Line up the alignment marks and place the
battery onto the dock on the charger.
• Slide forward in the direction of the arrow.
Alignment marks
3. 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.
4. The charge lamp (green) will flash slowly once the
battery is approximately 80% charged.
5. When charging is completed, the charging lamp
will turn off.
6. 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.
7. Consult qualified service personnel if the charging
lamp (green) does not turn off.
8. If a fully charged battery pack is inserted into the
charger again, the charging lamp lights up. After
several minutes, the charging lamp may turn off
to indicate the charging is completed.
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