My friend's brother called me to borrow the battery car, saying it would take a while, saying that the battery would starve to death if I wasn't at home, and should I be recharged?

Very good, a humorous brother. I suggest you lend it to him.

You are not at home, which means that you are very busy at work and often have to travel, and you are very hard;

Your friend's brother called you and borrowed your battery car, which shows that you are very familiar with your friend's brother.

He said he would borrow it for a while. Obviously, there are too many cars in your place, so driving a car is not as convenient as driving an electric car.

He said that if you were not at home, the battery would starve to death. It's a joke, but it's also true.

I suggest that you lend your car to him and charge it regularly, which can prolong the service life of the battery.