"dmc" wrote in message ...
In article ,

8 year guarantee expected average life = 12 yrs.

Or 100k miles isn't it?...that's less than 8 years for many people

Average is 100K miles. City dwellers even less. When batteries require
replacement then more advanced batteries will be available to make the car
even better. If you changed a transmission in 10 years on normal car, it
would not make the car run better and cheaper.