I have run into a battery power problem with my 300. I cannot get a battery to connect to the camera. I can only use the AC power supply to power the camera. I am not sure exactly where the problem lies, if it's the battery release button not engaging/disengaging problem or something else. The pins that align with the holes in the battery appear to be straight and not bent. I tried three batteries, 2 Sonys and 1 aftermarket, and none of them will connect to the camera. Has anyone else experienced this?