Makita DC18WB Manual De Instrucciones página 5

NOTE: If the charging light blinks in red, the battery condition is as below and charging may not start.
— The battery cartridge from just-operated tool or battery cartridge that has been left in a location exposed to
direct sunlight for a long time.
— The battery cartridge that has been left for a long time in a location exposed to cold air.
The charging will begin after the battery cartridge temperature reaches the degree at which charging is possible.
NOTE: If the charging light is repeatedly blink in red twice, 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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