Personally I think EV's would look better with a grill but quite a few of the "Eco" warriors see them as a badge of honour, a bit like the green section on the number plate.
I did watch a few videos online about 6 months ago where they had some really high performance EV rally and track cars which let's face it is worth getting into now as it's the future.
Anyway these things had massive batteries which were being discharged in about an hour and the problem they had was the batteries over heating
I believe they were having to install big fans to stop the things catching fire 
Cold is the enemy of any battery, leave a lead acid battery on a concrete floor and it will kill it over a short time, heat is also a problem, and fast charging produces heat.
Same for your phone, if you never fully charge it, like charging overnight, and never let it die, the battery will remain good for years.
If you have ever charged a lead acid battery, the charger will do it slowly, the last 10 or 15% takes much longer than getting it to usable charge, it is the same for EV,s, if you read the small print, it says never let it die or charge 100%, it shortens battery life, yet they get away with range claims that are based on 100% charge.
If you use one of those starter chargers, or jump leads, on a very flat battery, heat will be produced, inside the battery, at the terminals and through the cable.
They are racing EV,s and overcoming problems, because it sells cars and is the in thing, or they would like it to be, whether it is the future for mainstream motorists remains to be seen.