Question about Dewalt 7.2-18.0 Volt One Hour Charger

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De walt de9118 charger

I have a 240volt charger; when plugged in the red light comes on then goes off.There is 54volts dc at the battery terminals which troubles me. any suggestions,thanks

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When charger is plug in to ac it will blink once.normal voltage out for the unit in between 36v to 55 volt. the reading u have is normal.

Posted on Aug 08, 2008

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Greetings Gurus. I have Makita charger model DC18RC, battery model is 18v BL1815...manual is of limited help. I'm trying to understand what the indicator lights mean, what the time is for charging,


I agree that the pictographs are not very helpful. You probably have one of the new chargers. I have an old one, which is a little easier to figure out.

From top to bottom

1. The flashing green light with the electric plug indicates that the unit is plugged in and ready to go.
2. The flashing red little fan means that the battery is too warm so it is just cooling it and not charging it at that moment.
3. The solid red empty battery outline means that it is charging but hasn't got very far, less than 80% full.
4. The mostly full battery outline with both solid red and green lights at the same time means it is 80% full or more
5. The full battery outline and solid green with the musical notes means it is full up.
6. The broken battery outline with flashing red and green means you've got a broken battery.
7. The yellow light with the wrench means the charger is "conditioning" the battery, whatever that means.
8. The yellow light with the fan means "cooling abnormality."

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Hope this helps.

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Either the battery is hot from use or has been in the sun, let it cool down, then try again.

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