adric22 wrote:I would just like to point something out. Just because these "rules" are true, it should be worth mentioning the level of importance that should be placed on them.
For example, I have pretty much always charged my car to 100%. Since my commute is short, that means plugging the car in every evening when it has an 80% or more charge on it already, and topping it off to 100%.
However, when I got my 1 year battery report from Nissan I got 5 stars on every category except for one, which I for 4 stars on. The one with 4 stars was for "charging when the battery already has a high state of charge." According to the 4 star definition, I was well within the tolerances for the battery.
You are a perfect candidate for an 80% charge everyday; you might even be able to skip a day here and there. As general as those battery reports are, if got a 4-star rating in ANYTHING, I would take notice and stop charging to 100% from a high SOC.
I would much rather encourage people to error on the conservative side (80% charging via timer so the car doesn't sit for hours before use), especially if you plan on keeping the car and are looking for maximum battery life.