IMHO, every new car should come with a "plug-in-the-wall battery charger. Not some 20-AMP fast-charger, but just a 1 or 2 amp trickle charger, to keep the battery charged during periods of non-use or give the owner a easy way of being sure the battery is at fault (if you have it on a trickle charger for two days and it still won’t work, chances are it’s the battery). Add to this, it is very hard on an auto alternator to charge a dead battery. With a discharged battery, it is always better to charge it first with a trickle battery charger before doing than anything else.
As you can buy these aftermarket for less than $20, I can’t believe that an automaker couldn’t integrate such a device into the car for less than $5. No cables or cords, it is integral to the charging system, the owner has to supply the extension cord.
The other item is a 12Volt tire pump. These can be had for $9.95 aftermarket. An automaker could probably do it for less than $5. Just this past week, I drove my brother to the airport to pick up his car (his wife had to go out-of-town and just left it in the airport parking lot). After dropping him off, I noticed his rear tire was awfully low and stopped him. Brand new tires on a 10-year-old car, and one had a nail in it. I had a tire pump in my trunk and in about 10 minutes, he was on his way to the tire shop he bought the tire at. If we had to put on the spare, it would have take much longer and would have been the donut tire. As it was, we just had to wait until the tire pumped up.
Funny thing, just a day before, I had told the same brother that I thought every car should have such a pump. He said “Naw, tires these days don’t get flats that often, and when they do, a little pump like that won’t do any good”. Well, while the tire was pumping up, he said, “I think I’ll get one of those, now”.
So, go down to the nearest Harbor Freight or other cheap tool outlet and buy a trickle charger and a 12v tire pump, and put them in your trunk. Chances are you will need both over the life of the car; if you just need one of them, they will have paid for themselves. Paying $20 extra on the price of a car is really worth it.