This video will show you how to change the battery on a Honeywell 5815 Wireless Contacts!
First, find the slot on the side of the contact. Insert a small flathead screwdriver into the slot and twist. Inside, you’ll find a 3V lithium battery, CR 123. When you remove the battery, be sure to lift up from the Positive (+) side. When you insert the new battery, insert the Negative (-) side first.
Finally, place the cover back on. And that’s it! You will find more helpful videos on security systems in the Bay Alarm Learning Center.