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Dewalt charger flashing red light

I have two batteries one still has a bit of a charge but when either battery is put in the charger neither will charge and the red light continues to blink very quickly

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  • 231 Answers

Here is the manual for the charger - note on page 2 the meaning of the problem you describe - time to replace batteries (depends how old they are)
http://download.sears.com/own/00925737e.pdf

That being said, check the videos out, perhaps can get it to work after all for a while longer.

Posted on Apr 13, 2014

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6ya6ya
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Posted on Jan 02, 2017

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  • 32 Answers

SOURCE: batteries don't charge

Dust getting in the charger is a problem, Try blowing it out with a moisture-free dust remover, found at most any store. Green flashing means improper power, due to dust or power from the outlet, try a differant wall outlet. Red flashing means the charger or battery is to hot and must cool down before it will charge. The charger will not charge a battery if the lights are flashing. Solid Red light means it is charging and solid green light means it is charged. Plug the charger in first before putting the battery on the charger. If the charger has been droped or hit the floor the coil inside could have broke loose and dammaged the charger requiring it to be replaced.

Posted on Jul 14, 2009

  • 142 Answers

SOURCE: Batteries not charging

sounds like my charger, not making good contact

wiggle the battery around while pushing down and you can probably get it to make contact

sounds like you just need a new charger

Posted on Nov 12, 2009

tcraignfam
  • 30 Answers

SOURCE: Dewalt battery charger won't charge

As you know, solid red on your charger means that the battery is fully charged and the BLINKING red light means the battery is charging. Unless the light is blinking irradically everything is working the way it is supposed to. If the light is blinking irradically, the battery may just be too hot or too cold to charge ( like when you are driving many lags and your battery dies) and in this case simply wait 15 minutes to charge. If you get a fast blinking light still, the problem probably is with the battery.

Posted on Dec 12, 2009

emissionwiz
  • 76846 Answers

SOURCE: Cannot recharge 18v battery, place

You will need to replace the battery it is defective.

Posted on May 18, 2011

  • 885 Answers

SOURCE: broken dewalt battery 18v lithium ion

When a Dewalt charger is showing a fast blinking red light it means the battery is no longer chargeable. It may be because of a bad cell or short inside the battery. Whatever the reason the charger will not charge the battery and it needs to be replaced.

Posted on Jan 30, 2012

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I found this while searching to find an answer to solve my problem. It worked! Some say that it took them about 20 times... it took me about 7. Be patient and just keep trying! Hope this helps!



My NP 20 gave me the flashing red light of death and I got Casio to replace it. Then I had the same problem with my second NP 20 so I dug around for a way to fix it and I found the following advice on a site called FixYa. It worked instantly and I didn't risk ruining my battery.
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I had the same problem as this.
what i did was...
i kept putting the battery on the charger then took it off as soon as the red light came on.
i did this about 6 times.
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