The Toyota Prius battery life does last longer compared to the others because of the fact that they get only 60% charged. This also offers scope for regenerative braking. Normally the system usually offers the battery to vary its charge level by a maximum of 10- 15%. Therefore the battery is never allowed to get fully charged.
In the US the entire hybrid system has a warranty of 8 years for 100,000 miles and it does include the Toyota Prius battery life. When you live in California, you can get a longer lasting warranty for your Prius battery. They offer a warranty of 10 years or 150,000 miles.
