ROGER change your car battery without resetting your car memory

Car owners often get frustrated when car settings are reset after getting their car battery changed. The saved radio channels are all gone.  The clock reset.  Some power windows even become dysfunctional and a visit to the workshop becomes unavoidable. Not only more cost is involved, but also the time needed to get it fixed.

In this article, I’m going to show you exactly how to change your car battery without resetting the car settings. 

Before we show you the tips, all these hassle can be avoided if a trained technician is hired. At ROGER, we ensure that our technician are well trained and know how to handle car emergency situations. If you have not downloaded ROGER app, we strongly recommend that you download it now. It will save you a lot of time and trouble.

Why does this happen? 

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

If you are going to change the car battery yourself, there are tools you might have to buy that will cost you some money.  But this guide will help you change your battery without affecting the settings, while keeping the cost to a minimum.

Image showing a car battery being replace


For most cars, INSTALLING A NEW BATTERY is quick and easy. You could either change it yourself, go to your trusted mechanic or simply use ROGER app. You don’t need too many tools to change the battery. 

All You Need:

  1. A pair of gloves
  2. Safety goggles
  3. 12v backup battery
  4. Socket/wrench
  5. Two wires
  6. Jump leads

Step 1: Finding the problem

The first step is to determine whether you really need a battery change. Sometimes it’s not the battery that causes malfunction. Sulphate build-up is another common cause.  It can build up around the terminal in the form of whitish or blue residue.

Removing this residue can resolve battery issues. Common symptoms are:

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

Before removing this whitish powder, make sure you are wearing protective gloves. This powder can contain sulfuric acid which can burn your skin.

Step 2: Getting the right battery size

Get the right model number, car brand, and engine size info and inform your car service centre. They’ll be able to help you find the right battery size. Why is this important? 

It’s because different cars with different engine sizes require batteries of different sizes. Getting the proper battery size and capacity is important.  It’s just as important to make sure it fits the battery holding tray. Otherwise, your car would not start properly.

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. Change the battery in a safe and controlled environment. 


Step 4: Connect a secondary power source

There are two ways you can use a secondary power source. You can either use a booster/jump pack or use a twelve-volt car battery and a set of jump leads. You can buy a cheap 12v battery from hardware store.

Many prefer using memory saver, but according to industry experts, memory saver is not needed. Furthermore, it can mess up security settings by saving faulty codes. That’s why I prefer using a 12v battery as my secondary power source.

It’s time to connect the jumps leads to the secondary battery. Place your car battery down on the floor and connect the black lead to the positive terminal and black one to the negative.

Take the crocodile clips and attach them to the end of the leads that connect to the main battery. Be careful not to clamp both ends of the crocodile clips. Connect the red to the red and black to the black.

Attach the clips to a safe metallic part of the lead.  Otherwise, it will strike back while removing the leads from the battery current.


Step 5: Remove the battery

Now that the secondary power is all set up, it’s time to safely remove the battery. Use a socket wrench to loosen the lug nuts holding the 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 new 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 car service centre and tell them to get rid of it.

Step 6: Finally, Connecting the new battery

This is the last step. 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 you connect 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’ll be able to change a car battery without losing the settings.

Chaning of car battery

Final Words

Car batteries are potentially dangerous if its contents, like lead and acid,  are inadvertently exposed. So, never keep or store these batteries in curb side bins with typical household recyclable batteries.

The good news is: some shops today offer trade-in for your dead battery. This is because a 12V battery is the most recycled product in the world.