No, this is not Battery. They say that this is inverter related and will cost $5000. Toyota wants me to pay 50%! Still fighting. New Australian Consumer Law introduced in 2011 suggests that Toyota must repair this free of charge.
I got "check Hybrid System" error with all sensors are yellow on the dashboard of my 2012 Prius with 80k odometer reading. Toyota is telling that it will cost about $3000 for parts only. Trying to get free parts as the warranty expired last year. Google search suggests that this is a common problem. Do you anybody had this problem?