4 ENGLISH
Charging
This charger can charge two batteries at the same time.
1. Plug the battery charger into the proper AC volt-
age source. Charging lights will flash slowly in
green color repeatedly.
2. Insert the battery cartridge into charger until it
stops adjusting to the guide of charger.
The terminal cover of the charger can be opened
with inserting and closed with pulling out the bat-
tery cartridge.
3. When the battery cartridge is inserted, the
charging light color will change from green to blue
and charging will begin. The fast blue flashing light
indicates charged condition in 0–80 % and the
blue charging light will keep lighting up steadily
indicate 80–100 %. The 80 % indication men-
tioned above is approximate value. The indication
may differ according to battery temperature or
battery condition.
4. With finish of charge, the charging light will
change from blue one to green one and the mel-
ody sound or buzzer sound (a long beep) comes
out to notify completion of charge.
5. After charging, remove the battery cartridge from
charger and unplug the charger.
NOTE:
Charging time varies by temperature (10°C (50°F)–40°C (104°F)) that battery cartridge is charged at and con-
ditions of the battery cartridge, such as a battery cartridge which is new or has not been used for a long period of time.
Voltage
Number of cells
Li-ion battery cartridge
Charging time
(Minutes)
40 V (max.)
10
BL4020
22
40 V (max.)
10
BL4025
28
40 V (max.)
10
BL4040
45
40 V (max.)
20
BL4050F
50
NOTICE:
The battery charger is for charging Makita-battery cartridge. Never use it for other purposes or
for other manufacturer’s batteries.
NOTE:
If the charging light flashes slowly in blue color, charging may not start due to the condition of the battery
cartridge as below:
— Battery cartridge from just-operated tool or battery cartridge that has been left in a location exposed to direct
sunlight for a long time.
— Battery cartridge that has been left for a long time in a location exposed to cold air.
NOTE:
When the battery cartridge is too hot, charging does not begin until the battery cartridge temperature
reaches the degree at which charging is possible.
NOTE:
If the charging light changes to red color, charging is not possible. The terminals on the charger or battery
cartridge are clogged with dust or the battery cartridge is worn out or damaged.
