http://www.nikonchat.com/nikon-p5100-charger/
What should I do if my camera battery charging usual?
I have a Nikon P5100. When I plugged the battery in office, started blinking normally, then started to blink faster. I left in his clip, after a few hours and is still blinking thus. When I put it back in my camera had not charged at all and my camera does not even turn on. Does anyone know what is going on?
If your blink then it sounds like the charger is working, but the batter is dead, you will have to get another. If you have a spare then try that. Fortunately not too expensive Good luck RR
Nikon News