I have a 2001 Prius which has been very good to me until today. I was driving and saw the warning sign. I immediately had it towed to the Toyota dealership. They told me the main battery and the auxillary battery needed to be replaced but not to worry, it was covered under warranty. What a relief that was. They supposedly replaced it and I left. I really felt like the universes was looking out for me. Then the warning light came back on as I was leaving. I took the car back in and he took the paperwork (which stated it was under warranty and replaced), came back a few minutes later and said "whoops. Sorry, the batteries actually weren't replaced and you're not under warranty because you're over 100k miles. (I'm at 131). I asked him how much it would cost. He replied with $5,000. I still owe $7,000 on the car. So, first off, is it normal for both batteries to simultaneously go out? Somebody suggested that I should get the auxillary battery replaced and have the engine reset. This is all very foreign to me but I wanted some feedback. This person seemed to think that it may NOT be the main battery and that Toyota is trying to pull one over on me. Any suggestions? I'm so devastated that I might actually have to file bankruptcy because there's no way I can come up with 5k. Advice is greatly appreciated.