with your post mate,you dont have a clue,you cant test the battery in end station unless you have a pac tester ,are you using the radio keypad ?you dont give clear info,this panel is very good ,most faults are caused by the user you dont say how old your system is,early systems used 3.5 volt batteries in the sensors,new units use aa batteries ,you need to give more info you will have the red ring on keypad get back to us when you have checked all i have said,the guys on here are clued up,up to you mate
gts, September 2012