The biggest problem with using power adapters is, of course, you are limited to the length of the cable. (You can't take pictures outside in the garden if you are plugged into a socket in the house???) I use NiMh (1800mAh) batteries in my Minolta but have not found any problems yet. Haven't used my camera for over a fortnight and the batteries are still showing 75 percent full. I have two sets of batteries, one in the camera and the other set on charge. I also use a USB card reader to tranfer from camera to PC so don't really see the need for a mains adapter.