Have Makita drill with DC18 RA charger. Blinks Red and green as in posts below. However, took to Home Depot and put batteries on thier charger and they both charged. It is the charger not the batteries. Any suggestions to repair?

On the Makita 18-V DC18RA charger, the flashing red light means that the battery is not at the correct temperature for safe charging. If the battery is hot (from use or being in direct sunlight), charging will begin when the battery cools down. If the battery is cold, then charging will start when the battery warms up. (Note: the cold battery could have moisture condensation issues. This could delay the start of the charging cycle.) Home Depot has the manual for this charger here: https://images.homedepot-static.com/catalog/pdfimages/35/35393127-7c0b-4668-8609-9104ae7cc187.pdf . I suspect that Makita uses the same "code" on all of their chargers.

I hope this helps.

Cindy Wells

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Hi David, there are 2 things you can do.
1) If you still have the reciept, I would take it back to Home Depot and attempt an exchange, assuming the tools look like they only have half an hour on them. That will be the quickest, if it works.
2) Follow the link below, type in your zip code and take it into your nearest Authorized Warranty Center. They will also require a receipt.

At this point it is irrelevant what is wrong with it if its under warranty. If it ends up not being under warranty for whatever reason, your assumptions are correct. It could very well be both batteries at the same time, or a faulty charger. Big box stores like Home Depot dont recycle stock the way they should. I went to a local Home Depot and found a DeWalt battery with a date code that was 4 years old.
http://www.makita.com/en-us/Modules/Service/ServiceCenters.aspx

I hope this helps, and good luck.

This isn't true because I have a second charger and it works fine

your batteries are toast;must replace

Sounds like a bad battery. If so, be sure to recycle it. You can carry them to Lowes or Home Depot and drop in the recycle bin, usually by the front returns desk.

Maybe your battery is died, you can replace it on

http://www.drillbattery.com.au/buybattery.php/makita_1220_power+tool+battery.html