My Delta 18.0 volt battery charger does not...

Carefully take the charger apart - I had the same problem - use an allan wrench to take the charger apart - and on the circuit board is a fuse 4A 250 volt - my was blown - replace it and it should work - mine blew most likely from either water or dropping it. You have to carefully remove the fuse - they have tried to glue it in place but it will come out of the holder and the new one will go in easily.

Dan

Using a voltmeter on DC check the pos and neg terminals in the charger. It should read more than what the battery is rated if its quick charge. If not, it should read slightly lower than 18. If so, it sounds like the battery is bad. How old is it? DeWalt/PC/Delta has a pretty good warranty program. Lemme know. Please rate me