Im sure this is a silly question, but I am about to take a 4 hour drive with my Volt. What would be a good battery strategy? Ive got 3 miles of stop and go to drive before hitting the highway. I figure once I am down to 20 miles electric, switch to hold for the remainder of highway. Ill be going down a decent grade for a couple miles, I figure switch to low but keep it in hold mode. All that downhill would regen into the batteries right? Once back to city stop and go, switch to normal.