Slot a Makita battery into a charger and you are greeted by flashing lights, and maybe a catchy jingle depending on your charger. But what do these lights mean? Let’s have a look!
What Do The Lights on a Makita Battery Charger Mean?
So you’ve just got a Makita charger or maybe your borrowing someone else’s tools. You plug the battery into the charger and are greeted with lots of flashing, or solid lights, all meaning different things. But what do they mean, well I got my charger out and showed the different lights.
Flashing Green Light
This is how the charger looks when plugged in but with no battery in it. The green light will flash continuously, this just means the charger is plugged in but there is no battery inserted in it.
Solid Red Light
A solid red light means a battery is being charged. It also tells you that the battery is currently below 80% charged.
Solid Red & Green Lights
If both the red and green lights are solid then this means the battery is charging. It also means the battery is above 80% charged but it is not fully charged.
Solid Green light
A solid green light means the battery is fully charged.
Beyond the charging lights, there are other warning lights.
A flashing red light means the battery is overheating and should be removed.
Both lights flashing at the same time means there is a problem with the battery and it will not charge.
No lights on Makita Charger (DC18RC)
If there are no lights showing on your Makita charger it is not receiving power. When the Makita charger is plugged in and receiving power, a single green light will start to flash. This signals that a battery is ready to be inserted.
Important note: There is no power ON button on the Makita charger itself, you just have to plug it into a 240v power outlet and the green light should come on and start flashing.
The most common reasons are:
- The battery charger may not be plugged in to a plug socket.
- The power may be turned off at the switch (RCD may have tripped in the consumer unit)
- The fuse may have blown in the battery charger plug – If this is the case just replace it fuse with a new 13amp fuse.
Flashing Green light only on Makita Charger (DC18RC)
A single Flashing green light means that the charger is in stand by mode. It is connected an AC power supply and is ready to start charging your batteries.
Solid Red light on Makita Charger (DC18RC)
A solid red light means your battery is bellow 80% and having a good time charging as it should be. Don’t panic, the red light on your Makita battery charger is a good thing, not like a red light on your dashboard.
When the battery cartridge is inserted, the red charging light will light up and charging will begin. A brief pre-set melody sound will play to assure you that the battery is charging, The melody will chime again when the battery is fully charged.
Once the battery is over 80% charged the solid red light will be accompanied by a solid green light.
Solid Red and Green light on Makita Charger (DC18RC)
Congratulations! if you have a solid red and solid green light next to each other it means that your battery is over 80% charged. If you are desperate for your battery you can take it off charge now and get your job done. Or you can leave it till you get a solid green light signalling the battery is 100% fully charged.
Pro tip: I like to wait till the solid green fully charged light is on, and the fan has stopped whirring. Then I can be confident the batteries have finished their charging cycle!
Solid Green light on Makita Battery Charger DC18RC
The solid green light will appear on its own when the battery has finished charging. The charging light will change from solid red to solid green and the melody sound or buzzer sound (a long beep) will come out to notify completion of charge.
Red, Green and Yellow (All lights) on Makita Battery Charger DC18RC
If all the lights come one when you first insert the battery it could be because it is already fully charged. Try it in your tool first to see if it works!
If it doesn’t work leave it a few minutes and try inserting it again. If it still doesn’t work leave the battery for a few days to completely discharge, then try it putting it on charge again.
Flashing Yellow light on Makita Charger DC18RC
A flashing yellow light indicates a cooling abnormality. A yellow light will start to flash if the Cooling system has come into operation. The battery will still charge in spite of the warning light, but it may take longer than usual.
The yellow light will flash for warning in the following cases.
– Trouble with the cooling fan
– Incomplete cool down of battery, such as, being clogged with dust
The charger may have detected that the battery is too hot to charge at maximum efficiency.
You may also hear the sound of cooling air coming out of the charger in order to try and lower the temperature of the battery. You can leave the battery on charge, or you can take the battery out and wait for it to cool down before putting it back on charge again.
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 the cooling fan, the vent on the charger, can be sometime clogged with dust.
The Battery charger should be sent to repair or maintenance, if the yellow warning light flashes frequently.
Solid Yellow and Red light on Makita Battery Charger DC18RC
If the Yellow light does not flash, it could indicate that it is “conditionally charging” the battery. 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 the cooling fan. The vent on the charger can sometimes be clogged with dust.
The battery charger may “conditionally charge” to prevent fast wear out. In
the following cases:
1. Inserted battery temperature too high
2. Inserted battery temperature too low
3. Inserted battery is already fully charged
4. Inserted battery has Over-discharged, this can happen if the power tool has not detected that the battery is low and continued to drain power from it.
The re-charging time of such battery may be longer than usual as the battery may have continued to discharge in spite of low power.
Most Makita power tools are protected by “STAR” protection, this detects conditions that threaten to over-load, over-discharge or overheat the tool or battery. The tool will automatically cease operation, this prevents any damage to the battery.
Alternate Red and Green lights flashing on Makita Charger DC18RC
If the charging light flashes alternately red to green on a Makita (DC18RC) battery charger, charging is not possible. The terminals on the charger or battery cartridge could be clogged with dust, or the battery cartridge is worn out or damaged!
Flashing Red light on Makita Battery Charger DC18RC
A Flashing red light on a Makita DC18RC battery charger signals a Delay in charging. This can happen if the battery is either too hot or too cold. If the battery is below or above the ideal operating temperature charging may not start.
- The Battery cartridge may be hot from a just-operated tool.
- The battery cartridge may have been left in a location exposed to direct sunlight for a long time.
- Battery cartridge may be too cold if it has been left for a long time in a location exposed to cold air
Two Flashing Red lights on Makita Charger DC18RC
When the temperature of the battery is extremely hot, more than approx. 70°C, two charging lights may start flashing red. When the temperature drops to 50°C – 70°C, one charging light will flash red. Leave the battery to stand for a while to cool down before attempting to recharge.
Flashing Red and Green lights on Makita battery charger DC18RC
Flashing red and green lights indicate a Defective battery. Try taking the battery out of the charger and putting it in again, a couple of times. Sometimes this can cause the battery to start charging normally. If this does not solve the problem your battery may be faulty.
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