User manual MAKITA DC18RA

[. . . ] Other types of batteries may burst causing personal injury and damage. Non-rechargeable batteries cannot be charged with this battery charger. Use a power source with the voltage specified on the nameplate of the charger. [. . . ] Terminal cover of charger can be opened with inserting and closed with pulling out the battery cartridge. When the battery cartridge is inserted, the red charging light will light up and charging will begin with a preset brief melody sound coming out for assurance as to which sound will come out to notify the completion of charging. With finish of charge, the charging light will change from red one to green one and the melody sound or buzzer sound (a long beep) comes out to notify completion of charge. If you leave the battery cartridge in the charger after the charging cycle is complete, the charger will switch into its "trickle charge (maintenance charge)" mode which will last approximately 24 hours. Charging time varies by temperature (10°C (50°F) ­ 40°C (104°F)) that battery cartridge is charged at and conditions of the battery cartridge, such as a battery cartridge which is new or has not been used for a long period of time. After charging, remove the battery cartridge from the charger and unplug the charger from the power source. Inserting the battery cartridge into charger brings out last preset brief melody sound of completed charging. Removing and re-inserting it within five seconds after this action makes the melody sound change. Every time removing and re-inserting it within another five seconds after this, the melody sound changes in order. When the desired melody sound comes out, leave the battery cartridge being inserted and the charge will begin. When a "short beep" mode is selected, no completed charging signals comes out. With finish of charge, the green light remains lit with the red light going out and the melody sound preset at the insertion of battery cartridge or buzzer sound (a long beep) comes out to notify completion of charge. Preset melody sound remains stored even when the charger is unplugged. 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. 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. [. . . ] 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. If you leave the battery cartridge in the charger to prevent spontaneous discharging after full charge, the charger will switch into its "trickle charge (maintenance charge)" mode and keep the battery cartridge fresh and fully charged. [. . . ]