NFshooter150, I know you have probably done more troubleshooting with the BS4 than anyone in the U.S. and probably know more about how to get them running than anyone around, so I will listen to your advice with great interest. When I plug it in, it doesn't do anything. I've tried connecting it to a laptop as well, no joy there. I tried shooting over it to see if that "wakes it up," with no change. I have tried several other things with no change. Nothing I have tried helps. Obviously, the battery will die eventually. I just don't know how long that will take. The only thing draining the battery right now appears to be the little green light. I have a rechargeable bluetooth computer mouse that can run for a month on one charge. I suppose if a mouse can run that long on one charge, a little green light can burn for a long time if it is the only draw on the battery. Who knows.