richw wrote:I am quite new to this (have a 2016 Leaf I bought used and love it) but remain confused about the "charge to 80%' recommendation, since the Leaf has removed the Long Life mode option from its software. I called the official Leaf site today and was told, quite officially, that charging to 80% no longer applies because of battery technology improvement. She said that charging to 100% is fine. Not sure I believe this, but I assume you all in this foru,k know much more. Any suggestions?
Charging to 80% instead of 100% will give longer
life for any
Li-ion battery; this is known. Nissan's mistake was in making their guide read as if regular use of 100% was tantamount to abuse, and so the EPA seemed to decide if the customer was expected to use the 80% level so frequently then the EPA mileage results would have to reflect that. This of course lowered the already-low range estimate for the car, which you can imagine was very bad for marketing and the car was already getting bad press for battery problems by that time. Subsequently the 80% setting was removed.
That being said, the chemistry did
improve, though the real improvement came later than the 80% removal.
Again, using the lower level will extend the life of the battery. An 80% setting would be helpful, but Nissan can't or won't come up with owner language that will pass EPA scrutiny as a "convenience" instead of a "requirement" and not incur an EPA economy penalty. Other manufacturers have certainly managed this.
Some folks here can probably give you a better idea of how much 80% would benefit you. If the timer allowed 80% I might use it occasionally. I used it regularly on my 2012. Absent that function, I can't be bothered to jump through the hoops it would require. As Nissan indicate, the 2015 battery is far superior to the early version. My 2012 (often charged to 80%) lost its first "battery bar" shortly before the 3-year lease was up. My 2015 is nearing 5 years in service and has yet to lose a bar, despite always being charged to 100%.
tl;dr - Don't worry about it.