The most important part for the battery is to supply power to start your vehicle, and keep it in operation. If the battery is low or weak, it will not be able to provide enough power to the starter. This is an issue because the engine will not have enough power to start, and you will need to have call the battery jumped or repaired in order to drive. The battery also powers the electronics and accessories in your vehicle. The interior lights, headlights, radio, and other accessories all run off power that the battery supplies.
Remember if you have a faulty battery either have contact number of 24 hour towing service or 24 hour car battery service because it can be dead any time any where so its better to check battery and if it is not in a good condition just replace to get your peace of mind.
Checking a car battery is a simple job, but you will need a piece of equipment called a voltmeter. These can be picked up for cheap either at your local auto parts store or online, and will quickly tell you whether or not your battery is out of juice.
Finding your vehicle’s battery should be a cinch, but some automakers put them in odd places such as the trunk or under the rear seats. The vast majority can be found under the hood however, to the right or left of the engine. You can identify the battery by the positive (red/plus sign) and negative (black/minus sign) terminals that either route to a rectangular housing box or directly to the exposed battery.
Once you’ve located the unit, make sure your vehicle is turned off. If you’re using a digital voltmeter, set the dial to DC voltage. Next, take your voltmeter’s black lead to the negative battery terminal and the red lead to the positive terminal.
At this point, your voltmeter will give a voltage readout. Here are some guidelines,
12.66 volts 100% charged
12.45 volts 75% charged
12.24 volts 50% charged
12.06 volts 25% charged
11.89 volts 0% charged
another way to check your car battery is by cranking the engine. Crank the engine by turning the ignition until the starter engages and hold for 2 seconds have an assistant crank the engine while you check battery voltage drop.
At the crank, see the reading of the Power Probe. It should not go below 9.6 volts. A battery with a volt reading less than 9.6 volts means the battery is sulfated and not holding/accepting the charge.
Many batteries have 4-5 year warranties, but generally it has a life of almost 3.5 years, after this it may need replacement