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Yes to both, as I'd personally prefer to let the car sip a bit of juice every day while keeping the SoC around the midpoint. Mostly uneducated opinion based on both reading about the subject and interacting with people working in the field... my impression is that operating at an even lower SoC is better for longevity. My understanding is that as long as the battery is kept away from either extreme of SoC, such longevity extension benefits are minor. Need to research the technical literature to see what the latest controlled test data results yield. Perhaps more significant is the battery thermal control while the car is not being driven?

<Rant>Pity that the way our society is structured that the world's experts on the subject (outside the academic lab environment) are captive to corporations and, of necessity, tight-lipped, so it is difficult to find out what indeed would be the best practice in this example. Wouldn't it be wonderful if a battery expert from LG Chem or GM would be allowed to directly answer this question?</Rant>