I’ve a DX light which is about a year old. The light went dead when it should have after quite a bit of use.

Now the charger always show green (I guess it thinks its charged)
Has anybody run into the same problem?

Yes. Battery was ka put and charger showed green.

My charger occasionally shows green even when I know the battery needs charging. I’ve always managed to get it to turn red & charge either by running the light for another 10 minutes or unplugging & replugging the charger once or twice (or thrice).