If your car battery is low, you may be tempted to jump it with a charger. But this could actually damage the battery and cause it to fail sooner. A better option is to trickle charge the battery. To trickle charge a car battery, connect the charger to the car’s cigarette lighter or power outlet and set the charging rate at a low level. Let the battery charge for several hours, then increase the charging rate until the battery is fully charged. ..
