Looks like I'll be trying out Nikon's warranty service. My wife took the battery out of the rangefinder to get the number off of it, then put the battery door back on without replacing the battery. The door would not open when I tried to put a new battery in it. Tried everything I could think of to get it open and managed to finally break the battery door. Got it open but now it won't close. Wondering if anyone else has had this problem?