Originally posted by jdiritto Will using an ac adapter charge the batteries inside the camera, either in a grip or the body while in plugged in? or does it simply provide a power source so the batteries are spared?
thanks in advance
Can't really answer that question because I havent done testing. But last winter I shot star-trails in minus -30celsius temperatures with ac adapter for about four hours. When I was ready battery was still full (what was to be expected really), but at least this shows that Pentax K-7 battery holds up quite nicely in cold weather. And with short breaks in AC, battery acts as a nice alternative power supply.