How To Change the Battery on Your Honeywell 5815 Wireless Contacts

This video will show you how to change the battery on a Honeywell 5815 wireless contact. Or you can follow our directions below:

  1. Find the slot on one side of the contact.
  2. Insert a small flathead screwdriver into the slot and twist.
  3. Remove the 3V lithium battery, CR123. Be sure to lift up from the positive side.
  4. When you insert the new battery, insert the negative side first.
  5. Place the cover back on.

You’ll find more helpful videos on security systems in the Bay Alarm Learning Center.

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