rmay635703 wrote:I have driven EVs for many years and my experience is that once the battery is degraded to about 50% capacity you start having individual cell failures, I have never seen a cell degrade below 40% without becoming a door stop.
I may have gone the lowest, if not then certainly one of the lowest.
My last reading before battery replacement under warranty was:
05 bars ---------- 9/29/2016 ---------- 60161 ---------- LeafSpy (Lite) Ahr = 30.47, SOH = 46%, Hx = 43.03%
Also, I did not see any specific cells going bad, all the delta V readings were within 17 to 24 mV (IIRC).
My range was 26 miles from 100% charge to LBW. I never took it further to VLBW or Turtle mode, so there must have been a bit more range before it came to a complete stop. And, yes, I was driving to make old ladies look like race car drivers. Virtually never more than 48 mph, no more than four dots for acceleration, timing all the lights to save as much momentum as possible.
But still, even at 26 miles of usable range, it really wasn't a problem, and I would have kept going but for the warranty expiring. I usually go 10 to 12 miles round trip, but do that two times per day. I would then also on occasion take a long trip of 20 miles round trip a few times per week in addition. So I was keeping the car charged to 100% as much as possible. And when I didn't have an range, you can be sure I didn't forget to recharge every time I could.
I was driving about 14K to 15K miles per year, so the time factor for battery degredation may come into effect more for somebody only driving 5K miles per year. But where I'm at it is hot, but not Phoenix hot, which is a greater factor for battery degredation.
I too was interested in seeing what would happen by the 8-year limit, but the logistics of making a claim didn't balance against the risk of being denied. It is my opinion that all 2011 and 2012 batteries are "defective," but that is another debate and moot point now.