TimLee wrote:I think most of the LEAF drivers that regularly drive to LBW or VLBW have bought devices to know where they are on status of charge.
I drove my 2011 12,750 miles before exchanging it for a 2013. During that time I went below LBW 68 times, and 14 of those times I went below VLBW. Only once did I go to Turtle, and that was just as an experiment, driving around the block near home for the last couple of miles. Unlike Tim's guess, I never had any external device. I did keep close track of trip mileage at LBW and VLBW, and used Tony's rule of thumb that the distance from VLBW to Turtle was half the distance from LBW to VLBW.
My total mileage was low, and my climate not too bad, though we do have a number of days over 100°F each summer. The car always sat outside and nearly always charged at night -- usually to 80%. Even on the hottest days the nights cool to below 90°.
I didn't have data to allow any sort of accurate battery capacity calculation, but rough estimates based on miles, m/kWh, and charge bars suggest that I might have lost 2% to 5% capacity, but probably not much more than that, in the nearly 13K I drove the car. This leaves me with the impression that using DOD below 80% is not significantly harmful. I do have a different impression about going below VLBW (~90% DOD), though. I remember seeing a graph (perhaps from TickTock?) that showed a sharp knee in the voltage drop at about VLBW. I'm no battery expert, and you'll have to excuse the anthropomorphism, but that looked to me like a scream of pain from the battery.