I am still driving my 2009
I am still driving my 2009 Prius Hybrid with 150,000 miles on it and when driving at a normally fast pace am still seeing 50 mpg. When driving more conservatively, I can still get the 70 mpg advertised new. I could not see myself driving a plug-in model with such limited range as it would not be a viable option for any travelling unless it was a second vehicle. As far s the battery replacement, even with this mileage and age of the battery, I am still seeing the advertised fuel consumption. No, the battery will not last as long on solely electric power, it is rarely used as its primary mode of power. The Prius Hybrid's strength is keeping the engine in it's economic range, and it works all day every day.