The Prius guaratee is 8 years or 100,000 miles and the replacement cost (with labor) was quoted at $2800 from Toyota.

Time will likely kill these batteries before mileage, much like a car or a NiCad/NiMH/LiIon battery.

Brad "Diva": 2004 Mazda 6s 5-door, Volcanic Red Rex: 1988 Mazda RX-7 Vert, Harbor Blue.