To change a car battery safely, park on a flat surface, turn the engine off, set the parking brake, and always disconnect the negative (black, “–”) terminal first and reconnect it last. If anything feels unclear or inaccessible, a local mechanic or parts store can usually swap the battery for a small fee.

Tools and safety

• Wear safety glasses and gloves; car batteries can leak acid and produce explosive gas.
• Make sure the engine is off, key removed, and no lights or accessories are on.
• Avoid touching metal tools across both terminals at once, and keep jewelry away from the battery.

Removing the old battery

• Open the hood (or access panel) and locate the battery; note which side is positive (usually red, “+”) and negative (black, “–”).
• Loosen and remove the negative cable first, then the positive cable.
• Remove any bracket or clamp, then lift the battery straight up and out, keeping it upright.

Installing the new battery

• Place the new battery in the tray with the terminals in the same orientation as the old one.
• Secure it with the original clamp or bracket so it cannot move while driving.
• Clean cable ends if they’re corroded, then connect the positive cable first and the negative cable last, tightening both snugly.

After installation and disposal

• Start the car to confirm everything works; check that the battery does not move if you push it.
• Recycle the old battery at an auto parts store or recycling center; most will take it for free or as a core return.

For any modern car with tight spaces, complex electronics, or start–stop systems, it is safer to follow the exact steps in the owner’s manual or have a professional do the replacement.