We NOW work on Wildlife collars. In the past we have not done battery replacements on Wildlife - NO MORE. Our wonderful customers have sent us collars to experiment on and we now are confident in our ability to perform battery replacements on Wildlife Materials collars. We can install 8,000 or 16,000 batteries for only $40.00. Be sure to put your name and phone number inside the box, and tell us the size of batteries you would like us to put into your collars.