Stanton wrote:You do BOTH: cycle it as much as you can and leave it sitting at 100% as much as you can...IN THE HEAT!
There's a million threads on "how to kill your battery": why is there so much confusion?
I was talking generally about lithium batteries; discharging the cells below their fully-depleted voltage will cause FAR more damage FAR faster than keeping it at 100%. I know it's commonly said to keep it at 100% on this forum, but based on his experience that increased his battery's health when he tried. Also I'm not sure where he lives but he may have trouble finding HEAT to park it in right now.
Lastly, the Leaf has a low voltage cutoff (turtle) that will protect the car from intentionally discharging below the safe limit, so extraordinary measures need to be taken to get around that which is why I suggested taking it to turtle and parking it for a long period of time so any parasitic drain will do it's work. I am not sure, maybe the Leaf can put the battery in a protective state where it will have no parasitic drain whatsoever. Just trying to help by providing my experience.