I test drove a Clarity I was going to buy. The dashboard showed that the battery was half charged. 1) When I checked the information (using the menu on the screen), it estimated the miles remaining on battery as 13 miles. I was expecting 23 miles, because the Clarity is supposed to have 47 miles when fully charged, and it was half charged. Is the miles estimate generally inaccurate? Is the estimate inaccurate for new cars? 2) We sat in the car, when it was on and idle (with air-conditioning on) for a few minutes, and I saw the bars on the battery dashboard display go down much quicker than I expected (we lost a couple of bars in a few minutes). Is this reasonable? Does the air-conditioning usually drain the battery? Thanks!