False Alarms With Yale Hsa3400

[Shrek4947]

I have recently replaced the old batteries (Energizer Ultimate) in the siren box of my Yale HSA3400 with Duracell Ultra M3's and have started having false alarms, which it has never done before in the 5 years since installing the system. Could it be the type of batteries I have used (the manual says to not use "heavy duty")?

I have also recently installed a wireless router in the house - could this be interfering with the alarm and triggering it?

[camerabloke]

dont think batteries will matter, but wireless might, but doubt it