PSD Thank you for reporting back to the form on the cause of your battery drain issue. This issue was discussed back in October and the question was raised regarding falling NiMH batteries in the alarm/siren module and the possibly of draining the car's battery. Your post has confirmed this to be fact and something that others should strongly consider when they have similar battery drain issues.

"I have always been curious on how and when the rechargeble batteries in the alarm/siren are recharged. Is the car battery continuously charging the alarm/siren even when the car is off or does it only occur when the car is running? If it's the later, then what happens when the car is in winter storage, or the car has a dead battery. How do these factors effect the longevity of the rechargable alarm/siren batteries? It is assumed that cars in hotter climates will have their batteries degrade faster."