Am I correct in thinking that as long as the key is in the ignition im ok to disconnect the battery without the alarm going off ? Thanks for your thoughts.
AIUI, the stock advice is before you disconnect the battery turn the ignition on and then off again - then disconnect the battery before the alarm arms. The key just being in the ignition (with the ignition off) will not stop the alarm arming or activating. I wouldn't intentionally disconnect the batter with the ignition on.