The USAlert WatchDog LT Pager Battery Cover is a rugged black polycarbonate section of the WatchDog LT housing. Designed to hold the LT batteries in place and protect the battery compartment, the Battery Cover uses a metal fastening screw to attach to the back of the pager. Damage may sometimes occur to the Battery Cover by over-fastening the metal screw or by operational mishaps in extreme working conditions. Individual Battery Covers can be ordered and damaged units replaced without shipping the entire pager back for repair. The USAlert WatchDog LT Pager Battery Cover and the WatchDog Pager Battery Cover are the same size and are interchangeable.