Update:
I used Black & Decker Online Support to get some info.
re: Need Firestorm 14.4V charger, ps180
Hello Gene and thanks for using Black & Decker's on-line support.
If you are experiencing charger failure, your batteries should be tested for the correct voltage. When a charger fails, it could be because one of the batteries has a shorted cell. This can put an excessive load on the charger causing it to fail.
The batteries should be tested at our Vancouver service center:
Black & Decker
1735 Boundary Road
Vancouver, BC
604-291-9942
You can also test a battery by using a digital multimeter. To test the battery, it should be charged on a good Firestorm three-hour charger (do not use any other charger). The battery only needs to be placed on the charger for two minutes (this will not damage the charger if only done for two minutes). After charging for two minutes, its normal voltage should reach (example: 9.6 volt will read 9.6 volt). Batteries that do not reach their potential voltage will have a shorted cell.
A battery that has a shorted cell should not be used.
Along with getting the batteries tested, you may also obtain extra batteries and chargers through that same service center.
Thank you for allowing us the opportunity to serve you. If your question remains unresolved or if you require additional information please update this incident.
Sincerely,
Lynda
Appearently, there can be a dead cell in a battery that will screw up the charger as originel has said.
Cheers!