Toyota introduced to US market at the end of 1997. Since then most city has little shop for hybrid car specializing on battery. Now they range 1500-3000 ( not at Dealer) will last almost the same length of time.
If someone has electrical knowledge can replace dead battery buying from E bay. I am thinking of taking electrical lesson at vocational school in this summer. That will help me to repair at home electricity (minor work)  without calling for help.  Not trying to be a electrician but knowledge is wealth ( we never tried those kind of things back home)