I purchased the extended warranty for 84mo/100,000 miles with $0.00 deductable. I have used such contracts in the past with my cars and believe me some has really paid off! With all this electronic battery stuff on the hybrid, I wasn't taking any chances. As I understand the normal warranty for the battery is 3 years/80,000 but then part of the battery it says is warrantied for 8 years/80,000. Confusing to say the least but then thats why I went with the extended. I even got that 3/45,000 service and tire deal with mine so hopefully I will be covered for awhile!