This replacement lithium rechargeable battery is for use with the Perimeter Wi-Fi Wire Free dog fence collar as well as in the base station as a battery back-up. Keep a spare battery or two in your base station so you are sure to always have a freshly charged battery available. Keeping batteries in your base station also ensures constant battery in your battery back-up. 

 

Perimeter Technologies ships these batteries to us in bulk. They are not individually packaged on a cardboard flat.  We place them in a ziploc bag for shipment to you. 

 

NOTE:  The wrapping around the battery can vary in color.