Twice now I've found my D200 unusable due to completely drained batteries. This was after about 1 to 1 1/2 weeks of non-use with 2 fully or nearly fully charged batteries in the MB-D200 grip. And yes, the camera was in the off position the whole time. I didn't have a problem with battery drain without the grip and am currently running an 'experiment' without the grip and one of the batteries just in the camera to try to be sure it isn't just the camera draining the batteries. I submitted this issue to Nikon but have yet to hear back anything (other than the automated response). Interested in hearing similar experiences, tips, suggestions for determining the cause of the problem, etc.