Hellpo any advice welcome
Monday night car suddenly started alarming(audio only no light) ,  I opened shut door started engine etc, and all cleared fora hour or so, then it alamed about 7 or 8 times going off every 10-20 mins,.
Called AA they looked plugged in compuer as saws some alrms , but couldnt be sure of cause although did suspect power sounde battery.

Left car unlocked for next 24 hours, no alarms , then overnight had an alarm about 4am, when I went to go to work, the doors has aut