How To Recharge A Car Battery

A healthy battery will show 12 4 to 12 7 volts across both terminals when measured with a voltmeter a simple device that s very handy when diagnosing battery issues.
How to recharge a car battery. When you recharge a dead car battery it s very helpful to know just how dead it is before you decide how you re going to deal with it. Many battery chargers deliver two to six amps some allow you to choose the amperage level and will take at least several hours to recharge a dead car battery. While your vehicle s alternator can keep a healthy battery charged it was never designed to completely recharge a dead car battery. You will then have the ability to connect the batteries to one another using the jumper cables and recharge the dead battery by transferring energy from the functional battery.
Most of the time you will be able to charge the battery without taking it out of the car but if reaching the battery or fitting the charging cables in the engine bay or trunk where the battery is located proves difficult remove the battery from the car completely while you charge it. If your car battery is below 12 volts use a dedicated charger. In order to charge a dead car battery a set of jumper cables and a functional car with a charged battery is required.