2. Inspect the battery
Look for cracks, swelling, leaking electrolyte, loose terminals, or damaged cables. A swollen or leaking battery should generally be replaced rather than repaired.
3. Clean the battery case
Wipe away dust and dirt with a slightly damp cloth. Keep water away from electrical connections.
4. Clean corrosion from terminals
White, blue, or green deposits around the terminals indicate corrosion. Disconnect the battery according to the vehicle manufacturer’s procedure and clean the terminals with a battery-terminal brush. A small amount of baking-soda solution can help neutralize acidic residue on the outside of the battery and terminals.
