I have had the Nikon D40 for about 4 years. It has performed wonderfully and I love it. Just recently, the battery suddenly died (in one hour it went from 3 bars to one) and after several failed attempts to charge it, the camera would not allow me to take photos due to the battery needing recharging (flashing one bar). I ordered a new Nikon battery and put it in the charger when it arrived today. It registered that it was charging and after over an hour said it was completely charged. When I inserted it in the camera, the camera came on but said the battery needed to be recharged just like it did with the old battery and would not allow me to take photos. What do I do? Is this a fixable problem?

Thanks for you post. The most amazing thing happened. My camera is working again! The battery reads full charge and I have already recharged it once. My gut feeling is that with all the moisture we had with the humid weather this fall, water somehow got into the camera. With the weather now being so dry (heat on), there has not been a problem. If someone told me the camera would be working again like this, I would have never believed them. I thought it was hopeless and so did the man at the camera repair shop. What a turn-around! I have since put the little silicon packets you find in new shoes into my camera storage bag in the hopes of preventing this problem in the future. I also cleaned the battery heads and battery connecting points to see if maybe some dirt or moisture had collected on them. Hope you have the same luck!!!! Thanks for you post. The most amazing thing happened. My camera is working again! The battery reads full charge and I have already recharged it once. My gut feeling is that with all the moisture we had with the humid weather this fall, water somehow got into the camera. With the weather now being so dry (heat on), there has not been a problem. If someone told me the camera would be working again like this, I would have never believed them. I thought it was hopeless and so did the man at the camera repair shop. What a turn-around! I have since put the little silicon packets you find in new shoes into my camera storage bag in the hopes of preventing this problem in the future. I also cleaned the battery heads and battery connecting points to see if maybe some dirt or moisture had collected on them. Hope you have the same luck!!!!