Puyallup Bill
Member
The following link is to a Tesla response to a query about Roadster battery care. I suspect not that much has changed with the Model S battery. It sounds good to me.
http://www.teslamotorsclub.com/showthread.php/3848-Tesla-Roadster-Battery-Care
http://www.teslamotorsclub.com/showthread.php/3848-Tesla-Roadster-Battery-Care