2001 Ford Focus Owner Guide 4th Printing - Page 215
2001 Ford Focus Manual
Page 215 highlights
Maintenance and care If you see any corrosion on the battery cables or terminals, remove the cables from the terminals and clean with a wire brush. You can neutralize the acid with a solution of baking soda and water. Reinstall the cables when you are done cleaning them, and apply a small quantity of grease to the top of each battery terminal to help prevent corrosion. If your battery has a cover/shield, make sure it is reinstalled after the battery has been cleaned or replaced. Batteries normally produce explosive gases which can cause personal injury. Therefore, do not allow flames, sparks or lighted substances to come near the battery. When working near the battery, always shield your face and protect your eyes. Always provide proper ventilation. 215