The amperage capacity of a car battery is measured in two different ways: amp hours or cold cranking amperage, or CCA rating. The measurements mean two different things. Most automobile batteries have a capacity of between 45 and 50 amp hours. For most passenger cars, the battery CCA will fall between 400 and 600.Know More
Amp hours capacity refers to the amperage delivered during a number of hours when the battery is fully charged. In the case of 45 amp hours, for example, this means that the battery can delivery 1 amp for 45 hours, 2 amps for 22.5 hours and so on.
The CCA rating indicates how well the battery can start up in cold temperatures. Specifically, it measures the amount of current the battery is able to deliver for 30 seconds at a temperature of 32 degrees Fahrenheit. For larger vehicles such as light trucks it may run between 700 and 1000.Learn more about Car Parts & Maintenance
The normal life expectancy of a car battery is typically estimated at four years when it operates under normal conditions. This means that the battery does not operate under extreme temperatures, is submitted to a full charge cycle and is not used to power excessive accessories.Full Answer >
To test a car battery with a multimeter, set the multimeter to measure DC voltage, and set the dial to 20 volts; with the car off, disconnect the battery cables and attach the multimeter leads to the positive and negative posts on the battery. Wait for the reading.Full Answer >
To change a car battery, loosen the nuts that secure the cables to the terminals, and then lift the battery out of the car to exchange it for a new one. Wear gloves and safety glasses to protect yourself from acid leaks.Full Answer >
To jump start a car battery, expose the dead and working batteries, connect them with jump leads, start the working car, wait one minute, start the other car, wait several minutes, and unlink the batteries. This 45-minute procedure requires jump cables and a car with a working battery.Full Answer >