Do know with a lithium-ion cell phone battery, if the voltage drops below 3.7 volts that's the end of that battery. Requires a current cut off circuit so the voltage does not get any lower. If you leave a discharged lithium-ion battery lying around, like any other battery, its dead.
Wonder what will happen to your Tesla battery if the car is left in your garage for a couple of years without a maintenance charger, you could be out a couple of bucks.
Nickel cadmium batteries are entirely different, should be full discharged first before recharging. But they also have a high self discharge rate. If left in a power tool for a month or two, have to recharge them first.
Sulfuric acid batteries will freeze below freezing if not fully charged. If you take a lab type power supply set to exactly 13.5 V should fully charge the battery and show 0 amperes charging current. Had some that would only go down to 3 amperes, this means the battery has a high self discharge rate. But don't try to explain this to the party you purchased this piece of crap from, they are idiots.
Ask that question first before buying a battery, if they agree, they have a sale, self discharge is a very common problem, 60 AH battery will be stone dead in about 20 hours. See signs were frozen batteries are not covered under warranty, but darn things can leak internally just as well as externally, so stay far away from those places.
Anybody remember 15 bucks for a new battery, more like 200 bucks today.
Generally charging a battery looses about 30% of total energy, heat loss in the battery and the efficiency of the charger itself. Discharge runs about 10%, current is flowing inside of the battery that has internal resistance.
Not that really bad for a cell phone, but what about a car? Not sure about the Tesla, on the GM EV switching on the heat or AC will reduce your driving range in half.
For electric vehicles, coal in Nevada is still used for California EV's, power and heat losses in turbines to generator electricity, more in those super long high voltage towers, plus maintenance cost, more in the inefficiency of the chargers and the charging process itself, more in hauling the huge weight of these batteries, and more in converting chemical, to electrical to mechanical energy. And a lot more if you want to ride in comfort.
But the big deal is that the major pollution fall outside of the state of California.