Changing Car Battery is not a difficult task, but it is one that must be done properly. Learn how to Changing battery by following these steps. A correctly performed Changing battery extends your vehicle's life while keeping you and the environment safe.
Make sure the battery needs to be replaced. You don't want to spend time and money installing a new battery if the problem is not with the battery itself. Take the following three things into consideration:
Look for sulfate build-up in the form of a whitish or blue residue around the terminal —removing this can sometimes solve issues with a faulty battery. This residue may indicate a bad seal around the battery terminals and is leaking the acid out onto the terminals. Note: do not touch this powder with your bare hands, as it can often contain dried out sulfuric acid which will begin to burn your skin.
Verify that the battery has been given the chance to recharge properly by driving constantly for 30 minutes (with minimal electrical usage, including the air conditioner)
Finally, you should check the alternator. Some cars also have a battery meter, with the engine running, the alternator usually maintains a charge close to 13.8 – 14.2 volts in a properly functioning charging system. The battery should have 12.4 – 12.8 volts with the engine off, and with no accessory load.
Buy the correct replacement battery. Find out what kind of battery you're replacing(or the dimensions of your battery) and bring this, your car's make, model and engine size information to a local auto parts store. This is important because automotive batteries vary in size and electrical capacity and you will want to purchase a battery which matches the size of the battery tray/support in your vehicle.
Set up a secure working environment. Park on a flat, level surface at a safe distance from traffic, sparks or open flames. Put on the parking brake. Don't smoke, and make sure any smokers in proximity to the working area know not to smoke as well.Remember that electricity is not the only danger; batteries contain a sulfuric acid electrolyte solution, which is highly corrosive (i.e. can burn your skin) and produces a flammable hydrogen gas. Put on gloves and safety goggles.
Remove the cigarette lighter and plug the memory keeper into the lighter socket. A Complementary metal–oxide–semiconductor (CMOS) will keep the PIN codes and settings for radios and navigation systems from getting erased when you disconnect the battery. If you don't have a memory keeper make sure you have all the PINs for your electronic equipment before you start. You may wish to check your car manual to see what devices may be affected.
Prop open the hood of your car. After opening your hood, use the prop rod to keep your hood open (Most newer cars have hoods that hold themselves up.
Be aware that some cars have batteries locate elsewhere, like in the trunk, so you may not need to pop the hood at all.
Locate the battery. The battery should be located in an accessible part on either side of the car's frame. The battery is a rectangular box with two cables attached to it. Some European cars (some BMW's) have the battery under the matting in the trunk, some vehicles can have the battery located under the rear seat, or some are located inside the fender of the wheel well (some Chrysler's). The latter is often very difficult to remove.
Identify battery terminals. Locate the positive and the negative terminals of the old car battery. The positive terminal will have a plus sign (and is often red) and the negative terminal will have a minus sign (and is often black).
Disconnect the negative terminal. Loosen the negative cable clamp with a wrench(Usually 8mm or 10mm) and slide it off of the terminal. If the cables are unmarked,label them so that they don't get mixed up (otherwise you may ruin your car's electric system later on). It is also important that you disconnect the negative terminal socket before the positive terminal socket. Otherwise, you may short circuit the positive terminal to a grounded part of the car.
Remove the car battery. Unfasten the battery holder and remove any screws, clamps or bars holding the battery in place. Carefully lift the battery out of the car. Remember that a battery can weigh 30 to 60 pounds, or 13.5 to 27 kilos, so if you have any back problems, get a helping hand.
Clean the terminal clamps and the battery tray. You can use a baking soda solution and a wire brush. If there's any severe corrosion to the terminal ends or the cables, consider repair or replacement by a mechanic. Otherwise, let the area dry before moving on to the next step.
Replace the battery. Place the new battery where you just took the old battery out, with the positive and negative terminals on the correct sides. Connect all the screws, clamps or bars that may hold the battery in place.
Reconnect the positive terminal'. Tighten the clamps using a wrench.
Reconnect the negative terminal. Tighten the clamp with the wrench.
Apply battery lithium grease. Spray the terminals with lithium grease to prevent corrosion.
Close the hood. Shut the hood of your car firmly and start your car. Check that all the electronic devices are working properly. Remove any battery memory saver that was installed to save the radio memory.
Dispose of the used battery at service garages, auto supply stores, and recycling centers.There may be a small fee for the service, but throwing the battery away as normal garbage is not an option.
In the US, most battery retailers charge a deposit on the battery, which will be refunded with the return of an old battery.