My Scantronic 9450 alarm was tripped off by a power cut during the night for the first time ever, so I am lead to believe that the back up battery needs replacing. Not 100% about this but if so 1. Iam not sure what battery I need to replace it? 2. How do I replace this?

Julie Pitcairn, October 2011

open it up,one screw,remove the battery,get new one,connect it up,close lid key in your pin number,
when you remove the screw and open the panel the sounder will go off just key in ur pin to stop it,be careful you put the red wire to the red side of the battery,and the black to blacl,the 9450 is very old,
dp not touch any wires apart from the battery ones,because there is 240 volt present

gts, October 2011