Simon XT Door Window Sensor Battery Replacement Brinks Home Security Updated December 08, 2018 03:11 Follow Please fill in the information below... Battery Quantity* 1 2 3 4 Enter Full Name* Email Address* Primary Phone Number* Comments 2 comments Sort by Date Votes Marcio Periquito January 12, 2015 09:57 I´ts been a year having my apt monitored with you. I gues it´s time to have the doors and windows sensor changed, Am I rigth ? .I do not live in US...I usually visit that place twice a year... Also, the thermostat shows to me low battey... I will be in US in 10 days . How can I change the batteries on my thermostat ? Thanks, Márcio 0 Permalink David Gruener June 13, 2017 17:27 I just filled out the form, but I have no idea whether this battery is for the right sensor I need. 0 Permalink Please sign in to leave a comment.