False message on sensor

I have a contact sensor that said it was not connected to the system. But the battery symbol was fully green. I removed the batteries, tested them - about 0.4V. Replaced with new all OK. Is it a common situation where the batteries are FLAT but the App shows them fully green?

Hi @user27383. Typically the Ring app would reflect that the battery is low before it is drained completely. It’s possible this was a one-off experience, but I’m glad to hear the Contact Sensor is working properly after the batteries were replaced. If you notice the Contact Sensor become disconnected or unresponsive at any point, try the troubleshooting steps in this Help Center article. :slight_smile: