45. With finish of charge, the green light remains lit with the red light going out and the melody sound preset at theinsertion of battery cartridge or buzzer sound (a long beep) comes out to notify completion of charge. (In selectedsilent mode, no sounds come out.)6. Preset melody sound remains stored even when the charger is unplugged.NOTE:• The battery charger is for charging Makita-battery cartridge. Never use it for other purposes or for othermanufacturer’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 afull charge until after discharging it completely and recharging a couple of times. (Ni-MH battery only)• If charging light may flash in red color, battery condition is as below and charging may not start.– Battery cartridge from just-operated tool or battery cartridge that has been left in a location exposed to direct sun-light for a long time.– Battery cartridge that has been left for a long time in a location exposed to cold air.When the battery cartridge is too hot, charging will begin after the cooling fan installed in the charger cools the bat-tery cartridge. Charging will begin after the battery cartridge temperature reaches the degree at which charging ispossible. When the temperature on battery is more than approx. 70°C, two charging lights may flash in red color, andwhen approx. 50°C – 70°C, one charging light in red color.• If the charging light flashes alternately in green and red color, charging is not possible. The terminals on the chargeror battery cartridge are clogged with dust or the battery cartridge is worn out or damaged.Cooling system• This charger is equipped with cooling fan for heated battery in order to enable the battery to prove its ownperformance. 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 dustThe battery can be charged in spite of the yellow warning light. But the charging time will be longer than usual in thiscase.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 chargeConditioning charge can extend the life of battery by automatically searching the optimum charging condition for thebatteries in every situation.The battery employed in the following conditions repeatedly requires “conditioning charge” to prevent fast wear out. Inthat case, yellow light lights up.1. Recharge of battery with its high temperature2. Recharge of battery with its low temperature3. Recharge of full charged battery4. Over-discharge of battery (continue to discharge battery in spite of down of power.)The charging time of such battery is longer than usual.Note:• It may take twice the above charging time to the maximum because of the optimal charging selected according to thetemperature (10°C (50°F) – 40°C (104°F)), conditions of battery cartridge and maintenance charge.Voltage 9.6 V 12 V 14.4 V Capacity (Ah) Charging time (Minutes)Number of cells 8 10 12Ni-MH Battery cartridge— — — 1.7 20BH9020A — — 2.0 20— BH1220/C BH1420 2.0 15— — — 2.7 20BH9033A — — 3.3 30— BH1233/C BH1433 3.3 22Voltage 14.4 V 18 V 14.4 V 18 V Charging time (Minutes)Number of cells 4 5 8 10Li-ion Battery cartridge BL1415 BL1815 — — 15— — BL1430 BL1830 22