"If" it is a non Nikon battery then get rid of it. In my D80 (with grip) several years ago, I bought a couple of non Nikon batteries and virtually from day one, they just gave me trouble. Quick explanation of those terrible events...
I had the Nikon battery, inside the D80,, bought the grip which houses both batteries. Bought two extra batteries. They were Made In ***** replacements, which I didn't know any better about. Charged them all (3) up and placed 2 non Nikon batteries in grip. Worked well. After just a few uses, I noticed both replacement batteries, once charged up, only reading as 99% charged in the D80's menu "Battery Info". Genuine battery reads 100% when used. Cycled them a couple of more times. Still the same,, NEVER get 100% reading. Then it all started going to custard...
Repacement batteries suddenly would only take 5 to 10 minutes to charge up from approx 30% life left after using, to when the charger said fully charged (orange light stops blinking). Yet, put them in the camera and they read about no more than 50%. Charge them again and again. Each time the orange light stops after a handful of minutes and even if I leave the battery in for 2 or 3 hrs, still don't charge up. I tried this for about 3 - 4 days scratching my head all the time. I bought an expensive Lithium Ion battery charger, which seemed to work,, charging them to 100% but within seconds of viewing Battery Info, it went from 100% to 99% every time.. Then one of the replacements decides to go soft (not hold charge very well). It went flat after half an hour or maybe one hour at most when in the field...
Ok, had enough @^$#'ing around. Use only Nikon batteries from now. Uh-Oh,, now Nikon battery charger wont charge even genuine Nikon batteries. Tried again and again for a couple of days, but orange light goes out after approx 10 minutes and battery only charges up a few % now. Had a guts-full by this time. Wish I had never ever bought those damned batteries. Take the whole lot into camera shop and ask them what the heck is happening. I set it up on the counter and we leave the Nikon charger to charge Nikon battery. 5min,, 10min,, 15min,, 20min - 30mins, still charging. Murphy's law at its best. I stayed at the shop until battery charges right up,, approx 1 & 1/2 to 2 hrs and am red faced, not through embarressment but more through rage, but kept composure. Hey it all works again so I am happy now... The guy gave me 2 bits of advice - 1). Use only Nikon gear... 2). Get rid of third party batteries as they have seen this many times before...
Apparently those replacement batteries just confused the inbuilt circuitry chips in both charger and camera...
I bought another 2 Nikon batteries on the spot and happily went home. Those cheap batteries became satellites very soon after I got home...
No problems after that...