battery charger working?

I just received two new 18V batteries as my others would not charge. When I slide the charger on to either batter, no light, red or gree, shows up. Is the charger defective??
Larry V., January 2016


done
could be just the fuse in the plug... change the fuse with a fuse that you know is working, form the kettle,,

m, January 2016