If you have a Bushnell ELITE 1500 Laser Rangefinder like I do, "Fore-warned is Fore-armed".
Since the BATTERY DOOR is a part that is not fastened by a hinge to the Rangefinder, it can be lost, battery and all.
Yup, that happened to me. (While hunting) I called Bushnell when I got home, and they sent me a NOTHER one FREE OF CHARGE. They said it would take 3 to 4 weeks, but it arrived in about 3 days.
NOW, I have tape over the Battery Door so it won't come loose on me again.
Smitty of the North