The standard car battery has 12 volts. A fully-charged battery is essential to starting the car and provides power to the light and other car accessories. More »

To compare prices for an 18-volt battery charger, you first need to identify the type of battery you intend to charge. Generally, all chargers work well for all types of batteries except for gel cell batteries. If your b... More » Vehicles Car Parts & Maintenance

Read car battery specifications by examining the numbers on the label and deciphering them. Most car batteries have a manufacturer's name and model number along with ratings for cold cranking amperage, cranking amperage,... More »

To test an alternator, connect a voltmeter's leads to the battery terminals, then check the readout to see if the voltage falls in the desired range of 13.8 to 15.3 volts with the engine running. Troubleshoot other areas... More » Vehicles Car Parts & Maintenance

An ignition coil is a coil in a car's ignition system that carries the 6 or 12 volts from the battery to the many volts used to spark the spark plugs in the ignition. An ignition coil is also called a spark coil, and is ... More »

A lithium-ion car battery powers hybrid and electric cars. Lithium-ion car batteries provide an automobile technology that improves the environmental efficiency of cars. This type of battery is useful for green driving a... More » Vehicles Car Parts & Maintenance

If a car is hard to start, the issue is often the battery. While a dead battery does not turn the starter at all, a weak one turns it very slowly. This slow turn does not create enough compression to cause the fuel to ig... More »