Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
I'm sorry to hear about the problem. I will have some advice and recommendations, but first I need to ask a few questions about the camera, please?
How old is the camera? in months or years since you bought it.
And how old are the batteries or how old is the battery in it?
Has the camera been dropped or otherwise subjected to mechanical shock(s) in its lifetime?
Has the camera been operated in or subjected to, temperatures below 32 degrees F (freezing point) or above about 100 degrees F ?
Has it ever been subjected to a humidity higher than 85 % or gotten wet ?
Has the camera been operated in a gritty or sandy environment, such as a beach, a seaside, a construction site, or the like?
I must apologize for not being online (unavoidably) when you posted your response - thank you for the information.
If the batteries are 15+ years old, then most likely you have defective batteries. All technologies of rechargeable batteries for portable devices fail eventually.
I would recommend trying new batteries. The replacement battery needs to be charged up for 6+ hours before its first use, owing to its having been on a shelf for a considerable time.
(Perhaps I misunderstood you, as to the age of the batteries now in the camera? if so, I will reassess the case, if informed of the error.)