How to charge car battery. Make sure that the car is turned off and then attach the cables or the wires to the battery terminals. Connect each end of the positive jumper cable to the positive terminals on each car. Connect the charger to the battery.
Attach the charger cables. If it is necessary to remove the battery from the vehicle to charge it always remove the grounded terminal first. Heres how to charge a dead car battery.
When cleaning a white powdery substance off battery terminals wear gloves to prevent it from coming into contact with your skin. The charger will have two wires. Clean the battery terminals before charging the battery.
Attach the black cable from the charger with the negative sign on it to the negative terminal on the battery marked with the same symbol. How to charge a dead car battery. Then attach the red cable with the positive sign to the positive terminal on the battery with the corresponding symbol.
Take note of the positive and negative terminals on each battery. Depending on the age of your battery the capacity and advanced construction of the charger and the charging technique used it may take a few hours more or less to reach a complete charge. How to charge a car battery.
Be sure the area around to battery is well ventilated while the battery is being charged. How to charge a dead car battery jump starting the dead battery open the hood or compartment on each vehicle in which the batteries are located. The red wire has to be connected to the red or positive terminal it might be labeled the pos terminal on the battery.
Typically a car battery charger that charges at about 2 amps will require about 24 hours to deliver the full 48 amps your battery needs for a full charge. Make sure all of the accessories in the vehicle are off to prevent arcing.