First of all – I think EVs are great. They are the future of personal transportation. But this is the story of a first-gen EV battery with some … issues.
I bought a used 2012 Nissan LEAF with about 38k miles for a great price – in part because it started life as a leased car in Texas, and the early LEAF batteries didn’t much like the heat. As a result, the battery is not super healthy, with only about 60 miles of range on a full charge on a balmy day. While this is enough to get me around on most days, there are times when a bit more range would be nice. Thankfully, Nissan has retroactively warrantied LEAF batteries to retain 70% of their capacity (really, closer to 66%) for the first 5 years or 60,000 miles.
The LEAF dash shows remaining battery capacity (as opposed to current charge) on a 12-bar scale; when new, it showed 12 bars, and Nissan will warranty the battery if it gets to 8 bars or less. My car currently has 9 bars. 1 to go.
So this was a gamble. I’d actually like my battery to lose enough capacity before January 2018 to get a warranty replacement.
Thanks to a cool app called LeafSpy, I can monitor battery health,and correlate it to what others have said about when they dropped that 9th bar. I’ll try to remember to update this periodically, but here are the readings so far, with trend lines and “target” values based on when The Internet said they lost their 9th bar, on average. The aHr metric seems most relevant. With luck, it looks like I may make it, though I can’t explain the recent plateau after the initial steady decline…
I’ll try to remember to update this occasionally as time goes by.
Update: Here’s a constantly updated version of my stats: