The door has now been running on a cheap set of 4 “D” batteries for 2-3 months and hasn’t dropped a bar on the “Iris” battery monitor. I would speculate that the version without the Iris transceiver has even longer battery life. I have a 50lb Dingo, 75lb Siberian Husky, and 4lb Siamese cat. None have a problem operating this door.
https://www.amazon.com/PetSafe-Electronic-SmartDoor-Automatic-Activated/dp/B000WJ0IGA

