One problem related to battery dead has been reported for the 2009 Toyota Prius. The most recently reported issues are listed below.
Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6) several electronic malfunctions, all occurring when my blue tooth is connected. Some inadequately shielded wiring or connector(s) could account for this. I saw in the congressional testimony by a lady in a Lexus used her blue tooth connection to call her husband during the 6 minutes of struggle to stop her car's out of control acceleration by various methods including both feet onn the brake. I have a 2009 Toyota Prius that the dealer says is working "normal. " these events have not been normal, and on one occasion my energy screen that was doing wierd things actually changed to the speed dial screen. In another incident, (Smart key feature is disabled because it drains the battery) I locked the car with my key fob as usual, and when I returned could not unlock it that way and had to dig out the "key" to open the door so I could start the car. My battery has died 3 times and was finally replaced. I bought this Prius touring March 26, 2009. The dealer has no idea of what's going on, only tells me the car is "normal. " I suspect something so simple as shielding from the weak blue tooth signal could well be causing a variety of problems, probably depending on where the faulty wiring is located. If nobody is investigating this, iit is a mistake!. [xxx].