I have a 2005 Prius that's almost seven years old (it was one of the first '05s to show up at the dealer in late '04). Today my Toyota service shop told me the 12 volt battery was in need of replacement. (Note: not the big hybrid/traction battery, the little 12v battery that runs the computers so they can turn on the rest of the car, and powers the accessories etc.) The shop quoted a price around $450 for the replacement, which sounds a bit high to me. Anyone else had similar service? Does this price sound reasonable? Thanks.