I have a sterling 10 alarm system which was installed in 2002, I have mislaid the code that I had but at the moment I am happy to leave it disabled. The problem is that I have removed all fuses from the main installation panel/cabinet, disconnected the battery in the cabinet but every time the mains powewr fails (as we have had a few power cuts recently), the alarm still sounds, i assume there is a battery backup in the alarm box on wall but why hasnt it run down by now as I dissconnected every thing about 2 yrs ago. Any ideas.