What battery goes into a Honeywell 5811?

When your Honeywell wireless security system alerts you to a low battery on a zone programmed for your Honeywell 5811 wireless thin window and door sensor, you should replace the battery. If you do not change the battery, your Honeywell 5811 wireless thin door sensor will stop working within (30) days. Before the battery dies completely you may experience RF supervision errors as the weakened battery can reduce the wireless range of the 5811 door transmitter, so Alarm Grid suggests replacing the battery as soon as the low battery signal is detected.

The Honeywell 5811 uses a CR2032 3V lithium coin cell battery. Honeywell recommends using the CR2032 battery from Renata, Sanyo or Panasonic. However, the DL2032 from Duracell or the ECR2032 from Energizer are compatible batteries that will also work for the Honeywell 5811 wireless thin door and window sensor.

To replace the battery in your Honeywell 5811 wireless thin door sensor you will need a small flat head screwdriver. Insert the screwdriver into the notch along the short edge of the Honeywell 5811 and twist the blade gently to pry off the wireless transmitter from the back plate. Remove the bad battery and install a new CR2032 3V lithium coin cell battery into the 5811 wireless door and window sensor. Finally, hook the battery end of the 5811 onto the protruding plastic case tabs found along the short edge of the Honeywell 5811 back plate and swing the wireless transmitter into place, snapping the door sensor shut with firm pressure.

If your Honeywell L5100 LYNX Touch is being monitored by Alarm Grid, you do not need to put your wireless security system on test before replacing the battery in your Honeywell 5811 wireless window and door sensor. Once you have installed the new 3V lithium coin cell battery, the 5811 wireless transmitter will automatically send a low battery restoral signal to clear the trouble on your LYNX Touch alarm control panel.


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