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Depends on the door sensor. Look at the link below, identify your sensor, and it will tell you the right battery.
https://www.xfinity.com/support/articles/xh-device-battery-replacement
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I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
