Loving my brand new 2019 Niro EV! This being my first EV, I have questions about charging practice -- in particular, to what max level should I charge each night I plug it in? And does it matter if it's trickle or level 2 charging? My salesperson said if you really want to preserve battery life, just go to 80% or so. I'm fine with that since our daily use doesn't come close to that limit, so that's what I do currently. But I'm not finding any documentation to that effect in the owner's manual or anywhere else. I imagine "100%" according to the car is well under the true capacity of the battery, so that you don't overcharge, but I don't know if that makes it reasonable to always charge to 100%. What's the actual manufacturer recommendation?