Honeywell Door Window Sensor Batteries

Find the image of your door window sensor below to view instructions on how to complete your battery replacement.

Honeywell 5816 Door Window Sensor:

Press the end latch to remove the cover, then remove and replace the CR123A lithium battery

Battery Replacement Video

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Ecolink WST-232 Door Window Sensor:

Slide cover up to remove cover, then remove and replace the CR2032 Lithium battery

Make sure to securely snap the cover back together to prevent tamper activity.