Question about Drills
You didn't state which model charger or tools you have so I cannot find specifics on your charger. In all the chargers I've worked with and on, if both lights are flashing it usually means the battery is being read as defective and the charger won't charge it.
Posted on Jan 15, 2013
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Posted on Jan 02, 2017
that usually indicates a bad battery. I would unplug the charger for a couple minutes to reset it and then try again before looking at replacing the battery. Most shops have a tester there that can tell if it is in fact bad.
Posted on Jan 23, 2010
SOURCE: dc1804f charger
If you have tried discharging the batteries prior to charging them already with no result and from what you describe in your post, then I would have to say the charger has issues. Go to HD or Lowes (not sure if Lowes carry Makita) but another charger and test your battery again. If you get the same fault, there is an issue other than the charger, if not you need a new charger anyway. If you get the same fault with the new charger, you can always return the new one. Short of opening up the charger and using a volt meter, this is the easiest way to test to pinpoint the real problem. I hope this helps and good luck!
Posted on Nov 06, 2009
Alternate Red and Green flashing means bad battery. Buy a new one, or take it to a Makita Service center for replacement if it's under warranty.
Normally the yellow light indicates hot battery, but it could also mean dirty battery contacts so the heat sensor can't be read, or that the fan is clogged with dust and unable to cool the battery. The manual says let the battery cool and try again. If the yellow still flashes, it's contacts or the fan.
Read the manual online at:
Posted on Nov 04, 2011
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