How to Remove a Car Battery


Your vehicle’s battery starts the engine, keeps it running, and powers electrical components like the radio and cabin lighting. Eventually, the battery will need to be replaced if it is damaged or can no longer hold its charge. Learning how to remove a car battery at home in O'Fallon can save you time and money — and it’s pretty simple as long as you know how to do so safely! In the guide below from the Auffenberg Dealer Group service center, we’ll break down removing car battery step-by-step.

Tools & Supplies for Removing a Car Battery

The voltage stored in car batteries can deliver a deadly shock, so make sure you’re wearing proper protective equipment before removing a car battery: insulated work gloves, and safety goggles to protect your eyes from corrosive agents. Here are few more points to keep in mind before you get started:

  • Running vehicles can create sparks and ignite flammable agents, so remember to shut off the ignition before removing your car battery.
  • Secure the battery cables with zip ties to prevent them from touching each other, which could generate sparks.
  • After removing the positive battery cable, cover it with a cloth to avoid metal-to-metal contact.
  • Remove items like necklaces, watches, and bracelets so that you won’t get a shock if they contact the battery.
  • To prevent exposure to harmful gases, find a well-ventilated area for removing your car battery.
  • You’ll need a wrench or pliers, as well as a screwdriver.
  • Keep in mind that car batteries may weigh as much as 40 pounds.

What should you do if the terminal is fused? To avoid running into this problem while removing the car battery, keep a battery cable removal tool on hand to loosen it. You pick one up at our certified parts department near Caseyville, or order what you need online.

How to Remove a Car Battery Step-By-Step

When you have your supplies ready to go, follow these steps for how to remove a car battery:

  1. Locate the negative battery terminal. You’ll find it under a black plastic cover, markled with minus (-) sign.
  2. Use a wrench or pliers to secure the negative terminal, and then grasp the nut with another wrench or pliers. Pull the negative cable off the battery terminal and stow it safely away from the battery.
  3. Repeat steps 1 and 2 for the positive cable. Remember to ensure that the two battery cables never touch.
  4. If the battery is secured by a battery holding clamp, remove the screws and bolts holding it in place.
  5. Lift the battery straight up and place it on the ground.

When to Replace a Car Battery

A fully charged car battery should hold a voltage of 12.6 or higher when the car isn’t running. With the ignition on, the voltage should be 13.7 to 14.7 volts. You can schedule battery service at a East St. Louis-area service center, or follow these steps to test the battery and electrical system at home:

  • Start the ignition and turn on the headlights.
  • Rev the engine and keep an eye on the headlights. If they get brighter, the alternator may not be producing enough current to keep the battery charged while the car is idle.
  • If the lights stay at the same brightness whether the car is idling or you’re revving the engine, the battery is at the proper voltage level.

Schedule Car Battery Service in Shiloh

Whether you’re removing a car battery or bleeding your brakes, the expert technicians at Auffenberg Dealer Group are happy to answer all your DIY car car questions! Contact us today to learn more.

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