I know people periodically worry about the suggestion not to leave the car undriven for extended periods of time. I left mine at Wally Park on Oct 29 for a a 4-day visit that turned into a 3-week major bummer. So I left everything configured as normal, Smart Key on, 12-V fully connected, etc. When I retrieved it last night it was a perfectly happy little Prius. I only wished I hadn't been so unwilling to put the HOV stickers on it as the drive home took about the same amount of time as the second flight leg from Denver to LAX.