Answer to "Why do I get a batteries exhausted error?"I had the same problem with my Coolpix camera: I could charge for a couple min, but then the light went to “fast blink” mode and stopped charging and “Battery Exhausted” mode. I thought it might be a bad battery…but.. WITH TWO DIFFERENT BATTERIES? That made no sense. I read through many on-line answers, none worked for me. What worked for me was simply using a different transformer. The transformer I’d been using (apple white transformer) was too small: 5 V/2.1 amps (about 10 W) It would change the camera and then stop, and the light began fast blinking. I replaced it with a larger transformer : 5V/3.1A (about 15 W) and that worked fine. Problem solved. It was just that simple.