<p>We just got our 2006 HCH back from the dealer yesterday. They replaced the (main) battery. My wife, the primary driver of the vehicle, couldn’t believe the improved performance stating “it hasn’t been that peppy for several years now”. (Yes dear, I know. I’m the one that complained to YOU every time I drove it!) It will be interesting to see if our mileage improves much over the approx. 37 MPG we got when the car was newer.</p>