Nikon MH-65 Battery Charger status LED meaning
What does a blinking/static light with the label "CHARGE" mean? "Charging" or "done"?
It could be trying to get your attention when you can remove the charged battery.
It could be telling you that it's currently charging because something is happening.
But which is it?
What Nikon says
There does not seem to be a dedicated manual for the battery charger.
The following excerpt is from a random Nikon camera user manual (PDF):
First Steps/Charging the battery
Insert the battery into the battery charger by sliding the battery forward and press down until it locks into place.
- CHARGE lamp starts blinking when charging starts.
- Charging is complete when the lamp stops blinking.
- About 150 minutes are required to charge a fully exhausted battery.