We've all been there: you go to get your car and find the battery is dead and you can't start it. The quickest solution is to jump-start it with jumper cables connected to another car.
Connecting jumper cables to another car to jump-start yours is very simple. You simply connect the positive terminal of your battery to the positive terminal of the other battery, and the negative terminal of your battery to the negative terminal of the other battery.
In my opinion, it's best if the car that's going to help jump-start our car remains turned off . This is because if a short circuit occurs, and the other car is running, it could damage an electronic control unit, for example.
Once both cars are connected, simply start yours . When it's running, check that it stays running and then remove the jumper cables.
It's a good idea to check that the alternator is charging the battery . To do this, you can use a multimeter to check the voltage . If the multimeter reads around 14,7V, the battery is charging properly. However, if it reads around 12V less, the alternator isn't charging the battery, so it's a good idea to have it checked.
The next thing we need to do is charge the battery , and for this we have two options. One is to charge it using a battery charger for a few hours. Another solution, since not everyone has a battery charger, is to charge it by driving . It's advisable to take a longer drive on an open road so that it charges gradually.
To prevent this from happening again, if we don't use the car much, it's a good idea to start the car occasionally and take it for a short drive so that the battery doesn't completely discharge again.