I decided to do a video on this as it's a fairly common question I've come across and hard not to get several different answers. So, I reached out to Jeff Dahn (Tesla Industrial Research Chair and Professor of Physics and Atmospheric Science at the University of Dalhousie in Nova Scotia). I advised I was planning to keep my X for approximately 2 decades and asked him where he'd charge the battery to for day-to-day use, with long term preservation in mind. Check it out here: For those that don't wish to watch the video he recommends daily charging to 70 percent and to go ahead and charge to 100 percent for longer trips. He also comments on Vancouver being a nice climate for lithium ion batteries. Cheers.