For about a year now had increasingly false alarm problems after locking the car and recently the battery drained quickly after watching TV in the car while 'er indoors' was shopping, she was not please when I had to call someone to jump start and I was only watching for about 20 mins so I bought a new battery and I have had no false alarms since. I suppose not bad for 71/2 years. Strangely enough I had no starting problems with the old battery
Generally last for about 5+ years then the problems start.
You've done well but the TV does drain the battery, I have found about 155 minutes max before tell tale signs develop.