My battery in the '06 D40 just died - complete cardiac arrest!!! Am confused as to which size battery to replace with. Supercharge has one size - MF66, Repco have another - N70, Supercheap don't have a clue, the Century Fitting Book does't even mention the Model and cannot seem to find too much info on the net. It is the original in the Ute and that does not give me too much help. As you can see I need help. Thaks guys.