Invisible Fence pet containment systems require a new battery in the dog's collar every 3 months. Invisible Fence dealers sell battery packs for around $15. This expensive battery is a plastic case around a common CR1/3 lithium cell, readily available from any hardware or drugstore for less than $5.00. Here is how to "renew" your battery in about 1 minute!
Step 1: Prepare tools and supplies.
You will need:
- A 3V lithium cell known as CR1/3N or DL1/3N
- A spent Invisible Fence battery module
- A razor blade, a sharp knife or a very small shovel
- Optionally, something to grasp the battery with to avoid cutting off your fingers.