How to Change Car Battery Without Losing Your Car Memory

Car owners often get frustrated when car settings are reset after getting their car batteries changed. The saved radio channels are all gone. The clock reset. Electrical system of your car, the vehicle power windows for example, can be dysfunctional. A visit to the workshop becomes unavoidable. Not only more cost may be incurred, but also the time needed to get things fixed.

Why does replacing battery reset car memory, anyway?

It’s because auto manufacturers employ anti-theft measurements in your vehicle. If your vehicle loses power or the connection to the battery terminal is cut, the radio signal will be disabled. Unless you enter a special security code, it won’t function. Many car owners have no idea this feature exists.

If you are going to change the car battery yourself, there are tools you might have to buy. This guide will help you change your vehicle’s battery without affecting the settings, while keeping cost to a minimum.

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What You Need:

  • A pair of gloves
  • Safety goggles
  • 12V backup battery
  • Socket/wrench
  • A set of jump leads
  • Multimeter to test the battery strength

Step 1: Finding the problem

The first step is to determine whether you really need a battery change. Sometimes malfunctions are not caused by a weak battery. It could be due to sulphate build-up, a whitish or bluish residue around the terminals. Removing this residue can resolve battery issues. Common signs are:

  • Bad seal around the battery terminal
  • Acid leaks near the battery (smells like spoiled eggs)
  • Battery power running low

Before removing the whitish powder, make sure you are wearing protective gloves. It contains sulfuric battery acid which can burn your skin.

Step 2: Getting the right battery size

Get the battery model number, car brand, and engine size info ready. Inform your car service center. They should be able to help you find the right battery size. 

Vehicles of different engine sizes require batteries of different sizes. Getting the proper battery brand and capacity is important to optimize the battery life. It’s just as important to make sure the battery fits the battery holding tray.

Step 3: Set up a proper working area

Make sure you wear proper safety gears. Batteries contain not only sulfuric acid but also other corrosive material that can produce flammable hydrogen. Perform battery replacement in a safe and controlled environment.

Step 4: Connect a secondary power source 

There are two ways to employ a secondary power source. Either use a booster/jump pack, or a 12V car battery as donor and a set of jump leads. Some prefer using memory saver, but according to industry experts, it is not entirely necessary. Furthermore, it can mess up security settings by saving faulty codes.

Time to connect the jumps leads to the donor battery. Place the donor battery down on the floor. Connect the crocodile clips to the terminals in the following order:

  1. Connect RED (positive) clip to the positive terminal of the dead battery
  2. Connect RED (positive) clip to the positive terminal of the donor battery.
  3. Connect BLACK (negative) clip to the negative terminal of the donor battery.
  4. Connect BLACK (negative) clip to an unpainted metal part of the dead car, far way from its battery.
  5. Start the engine

Step 5: Remove the battery

Now that the secondary power is all set up, it’s time to safely remove the dead car battery. Use a socket wrench to loosen the lug nuts holding the dead battery and safely remove the clamp. Now that you have loosened up the tray, the battery is no longer attached to anything physical. Remove the leads from the battery. Use your socket wrench set to loosen the bolts on the battery leads that are holding the clamps.

Be extra cautious while removing the negative lead from your current battery. Always keep the crocodile clips connected from your secondary power source. Then one by one, remove all the leads and safely take out the battery.

After that, the only thing juicing the car is your 12v car battery. Finally, take out your replacement battery from its box and keep the old one for safe disposal. What do you do with your old battery? Take it to your local auto parts store and tell them to get rid of it.

Step 6: Finally, connect the new battery

Place the new battery in position without touching the old leads that are currently supplying power to your car. Connect the red to the positive terminal and black to the negative terminal of your new battery. After connecting the leads, take the crocodile clips off them.

Now, tighten the bolts on the battery tray. Remove the secondary power source and put the clamp back in place.

Start your engine for a test run to check if the battery and settings are all OK. If done correctly, you have just changed a car battery without losing any car settings.

Final words

Car batteries are potentially dangerous if its contents, like lead and acid,  are inadvertently exposed. So, never dispose them like usual household batteries. The good news is: automotive shops may offer trade-in for your dead battery. This is because 12V batteries are among the most recycleable product in the world. 

Feel overwhelmed? ROGER can do it all for you. We perform battery check and test. We deliver and install. We provide 12-month warranty on the batteries, and e-hailing drivers are covered as well.

Install ROGER app now!