What Type of Battery Does My Honeywell Wireless Door Sensor Use?

The type of battery that your Honeywell wireless door sensor uses will probably be one of three different varieties. Most Honeywell wireless contacts use CR123A lithium batteries, CR2032 coin batteries or AAA batteries. Use the table below to determine the correct battery for you sensor:

NOTE: When a transmitter uses multiple batteries, be sure to change all batteries in the sensor at the same time. Do not mix fresh batteries with depleted batteries in a single transmitter.