cybergibbons Posted May 28, 2013 Posted May 28, 2013 Normal lithium ones. They probably only wake up for about 20ms out of that 20s i.e. 0.1% of the time they are awake. Suspect it is a synchronised system like Texecom and Visonic. I have a blog, some of which is about alarm security and reverse engineering:http://cybergibbons.com/
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