Try cleaning the contacts on the charger and the battery. If you have another charger, try charging the batteries on that charge. If you have another camera try the batteries on the other camera and see what the in camera battery reader says. It could be the charger or the in camera battery reader, if its not the battery.
Cheers,
Joe
Ancora Imparo
"A good photograph is knowing where to stand."
― Ansel Adams
"There is nothing worse than a sharp image of a fuzzy concept."
–- Ansel Adams
"You don’t take a photograph, you make it."
--- Ansel Adams
