The car battery is a very important part of the vehicle and needs to be regularly checked for signs of corrosion or wear. It is also useful to carry a set of jumper-leads in the car. Be careful when connecting and disconnecting them and if in doubt ask someone who is confident using jumper-leads to help. Just remember that some 4WD vehicles have a
24 volt electrical system so be especially careful using jumper-leads on these kinds of vehicles.