Thanks for sharing. Power saving mode sounds very smart. I am interested in knowing what is longest it can hold without draining the battery completely. Further, I want to find out how much juice it has left so I can plan ahead.I went away for 17 days this summer and when I returned the car started fine with no battery messages. When I 'checked' on the car using Volvo on Call while away it said something along the lines of my vehicle was in power saving mode since it hasn't been driven in a while.