CHARGER PROBLEMS what does it mean when the red light flashes on a dewalt de9118 charger when trying to charge a battery? how do i no when the battery is no good?

usually indicates battery has failed slow blink charging steady red fully charged

On some chargers, when the light blinks rapidly, it means that the battery is bad. Try looking up charger information on-line.

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.

These de0245 chargers are designed to detect certain problems that can arise with battery packs which would be indicated by the red light flashing at a fast rate.

If this occurs, re-insert battery pack. If problem persists, try a different battery pack to determine if the charger is OK. If the new battery charges correctly, then the original pack is defective and should be returned to a service centre for recycling.

If the new battery pack gives the same trouble indication as the original, have the charger tested at an Authorised Service Centre.

If you need new battery for this tools

The Dewalt charger's red light will flash while charging and go to steady red when the battery is fully charged. If you go to the Dewalt ServiceNET site at http://servicenet.dewalt.com/ you can search for the manual for any of your tools. DCK294L3 does not have a manual as that is the model number for the whole kit. Search for the model number of each of your tools and you can get the manual for them. Inside the manuals it also describes the different meanings of how the red light is flashing on your charger.

If you look on the charger there should be a flashing codes should be explained depending on the type of flashes. Very fast flashes, means bad battery.

They usually have a little pic on there that tells you what the blinking means. I think it is charging, but sometimes it needs a green light too. Check it out. Mine flashes all kinds of signals, when it hits a dead battery, one that won't charge, it flashes something else. It only takes an hour to charge. Is the battery getting charged at all? Hope this helps.

it doesn't change to green, the solid red light means it is fully charged, there should be a legend on the front of the charger to help you with this. If it flashes real fast the battery is malfunctioning and slow flashing is charging and again solid is fully charger.

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.