they also did not figure in repairs as the prius is reported (by toyota) be in the very low cattagory for problems/repairs, I do not know about the hummer.
As for lifespan it is reported some of the early prius's are getting up on the high miles of over 200000 miles with the origanal batteries
just do a search for "prius hummer" and you will find alotg reif [ Parent ]