Cooling System; Conditioning Charge - Makita DC18SE Manual

Voltage
Number of cells
Ni-MH Battery
cartridge
Voltage
Number of cells
Li-ion Battery
cartridge
Note:
• It may take twice the above charging time to the maximum because of the optional charging selected according to
the temperature (10°C (50°F) – 40°C (104°F)), conditions of battery cartridge and maintenance charge.
NOTE:
• The battery charger is for charging Makita-battery cartridge. Never use it for other purposes or for other
manufacturer's batteries.
• When you charge a battery cartridge which is new or has not been used for a long period of time, it may not accept a
full charge until after discharging it completely and recharging a couple of times. (Ni-MH battery only)
• If you charge a battery cartridge from a just-operated tool or battery cartridge which has been left in a location
exposed to direct sunlight for a long time, the charging light may flash in red color. If this occurs, wait for a while.
Charging will begin after the battery cartridge is cooled by the cooling fan installed in the charger or the charger is
cooled.
• When charging the battery cartridge with a hot charger, the charging lamp may flash in red. After the charger is
cooled, charging starts.
• If the charging light flashes alternately in green and red color, or flashes in green color when the battery cartridge is
inserted, a problem exists and charging is not possible. The terminals on the charger are clogged with dust or the
Makita battery cartridge is worn out or the battery of automobile is out of order.
• When the battery of automobile works out of order, the charge lamp does not light on even if the charger is plugged
into the automobile cigarette lighter socket.
• When the remaining automobile battery capacity gets small, stumble down acceleration pedal and charge the
battery cartridge while stumbling down. After completion of charging, be sure to unplug the charger from the
automobile socket.
• When charging some battery cartridges successively, the charging time may get longer.

Cooling system

• This charger is equipped with cooling fan for heated battery in order to enable the battery to prove its own
performance. Sound of cooling air comes out during cooling, which means no trouble on the charger.
• Yellow light will flash for warning in the following cases.
– Trouble on cooling fan
– Incomplete cool down of battery, such as, being clogged with dust
The battery can be charged in spite of the yellow warning light. But the charging time will be longer than usual in this
case.
Check the sound of cooling fan, vent on the charger, which can be sometime clogged with dust.
• The cooling system is in order although no sound of cooling fan comes out, if the yellow warning light will not flash.
• Always keep clean the vent on charger and battery for cooling.
• The products should be sent to repair or maintenance, if the yellow warning light will frequently flash.

Conditioning charge

Conditioning charge can extend the life of battery by automatically searching the optimum charging condition for the
batteries in every situation.
The battery employed in the following conditions repeatedly requires "conditioning charge" to prevent fast wear out. In
that case, yellow light lights up.
1. Recharge of battery with its high temperature
2. Recharge of battery with its low temperature
3. Recharge of full charged battery
4. Over-discharge of battery (continue to discharge battery in spite of down of power.)
The charging time of such battery is longer than usual.
4
9.6 V 12 V
8 10
BH9020A —
— BH1220/C
— —
BH9033A —
— BH1233/C
14.4 V 18 V
4 5
BL1415 BL1815
— —
14.4 V
Capacity (Ah)
12
— 2.0
BH1420 2.0
BH1427 2.7
— 3.3
BH1433 3.3
14.4 V 18 V
8 10
— —
BL1430/A BL1830
Charging time (Minutes)
40
40
55
70
70
Charging time
Capacity (Ah)
(Minutes)
1.5 30
3.0 60