Makita DC64WA Instruction Manual page 5

NOTE: If the charging light flashes in red 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 flashes alternately in green and 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.
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