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How to Replace a Car Battery

Changing a car battery is something that most people will be able to do themselves. The hardest part is usually to lift it out of the car once it has been disconnected because it’s weight. Keep track of your battery’s life and replace it before it leaves you stranded.

Make absolutely sure to first note the location of the positive and negative battery cables.

  1. Disconnect the negative battery cable using a wrench. Be extremely careful not to place metal tools or objects across the battery posts. Auto batteries can be explosive.
  2. Disconnect the positive cable. Positive cables are usually marked with the color red and a “+” symbol. Use the terminal puller for easy removal (top post batteries.)
  3. Remove the automotive battery hold-down clamp or retaining system. Place parts and fasteners aside, in a place where they won’t get misplaced.
  4. Remove the battery itself, being careful not to knock it around too much. Use a battery carrying strap, if it is a top post battery, to make it easier to handle.
  5. Install new battery and secure with retainer. Before removing the battery post safety caps, make sure that the battery connectors are clean, and that the red post is in the right spot for the positive battery connector.
  6. Wipe down the new battery and be sure terminals are clean. Then apply a thin layer of dielectric grease and anti-corrosion washers to both posts and connectors.

Connect the positive post first, then tighten the connector until it is snug. Then connect the negative post and tighten the connector until it is snug. Reassemble the retaining system and check for movement. You’re finished!

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