Replace the battery in your PetSafe® 100 m or Basic Remote Trainer or older model of the Deluxe In-Ground Cat Fence™ System. This 2-pack of 3-volt coin cell batteries has a 5-year shelf life and typically lasts 1-3 months.

Features
2-Pack
Compatible with PetSafe® Remote Trainers and older models of the Deluxe In-Ground Cat Fence™system:
100m Little Dog Remote Trainer (PDT20-10644)
100m Big Dog Remote Trainer (PDT20-10645)
ST-100-LD Little Dog Remote Trainer (PDT17-13471, PDT45-13472)
ST-100-BD Big Dog Remote Trainer (PDT17-13473, PDT45-13474)
ST-70 70 m Basic Remote Trainer (PDT17-13480, PDT45-13481)
Deluxe In-Ground Cat Fence™ (model purchased before August 2010, PCF-1000-20)
Deluxe In-Ground Cat Fence™ Extra Receiver Collar (model purchased before August 2010, PCF-275-19)