Should Battery Terminals Be Greased?

In the Cleaning a Car Battery section, it says to prevent corrosion, you should put grease on the clean terminal post before you reattach the cable. ... It will not interfere with the electrical connection, but will help prevent future corrosion by displacing the air in the surrounding space.

What is the best thing to put on battery terminals?

Step 5: Rub petroleum jelly onto the terminals and reattach the cables. Once the terminals are dry, dab a bit of petroleum jelly onto them. This will lubricate them, help prevent further corrosion, and help strengthen the connection. Reattach the positive and negative cables, and you're all set!

Should you put dielectric grease on battery terminals?

You only need a very thin layer here, though. As metal corrodes it expands. This will push apart the metal-metal contact at the battery posts. So, good to have the dielectric grease to stop that corrosion, and good to apply proper torque to the battery terminal.