I have been watching local dealer Clarity inventories over the last several months while I have been deciding whether to buy one. Based upon inventories, it appears very few are being sold in my area. One dealer has had three of the same color on the lot for almost three months. All three have been parked on the end of the lot, and it doesn't appear they have been physically moved. I have read that allowing the battery to run down is bad. Is there a way to know if they have kept the battery charged? Thanks in advance.