Why Is My Dewalt Charger Not Working. The DEWALT chargers have a maintenance mode which allows batteries to remain in the charger maintaining a fully charged pack until the user is ready to work. And if it is not you need to change it immediately.
Fast flashing indicates a poor connection between the battery and charger or a problem with the battery pack. If the reading on the voltmeter doesnt match the voltage setting on the charger the charger is likely bad and will need to be replaced. Your DeWalt battery pack is now reset.
20v Battery Not Charging Suddenly.
When I put it on 2 different chargers they both go to a solid red light saying its fully charged after about 10 seconds of flashing. You are not to unplug the charger until it reaches its maximum battery capacity or until the blinking red light turns to green. When a drill runs intermittently the problem can be traced to a bad cord or worn brushes sometimes the switch may be defective but usually the switch fails in the on or the off position. Storing DEWALT Lithium Ion batteries outside of the charger will not result in loss of charge.
