if the log reports wireless tamper restore ,thats what the problem is .make sure both tamper contacts on the device are making good contact,people often forget there is a switch on the back of the contact pcb as well as the front..
Re:replacment batteries for wireless alarms.most systems use CR 123,orCR2 lithium cells,they can be purchased from Boots,sainsburys etc,but they cost about a fiver each but you can get them on line cheaper.the batteries for external sounders,and the back up panel battery can only be purchased on...