2002 Nissan Xterra Owner's Manual - Page 202

BATTERY Follow the manufacturer's instructions for the mixture ratio. Keep the battery surface clean and dry. Any corrosion should be washed off with a solution of baking soda and water. Make certain the terminal connections are clean and securely tightened. If the vehicle is not to be used for 30 days or longer, disconnect the negative (−) battery terminal cable to prevent discharge. WARNING Do not expose the battery to flames or electrical sparks. Hydrogen gas generated by the battery is explosive. Do not allow battery fluid to contact your skin, eyes, fabrics, or painted surfaces. After touching a battery or battery cap, do not touch or rub your eyes. Thoroughly wash your hands. If the acid contacts your eyes, skin or clothing, immediately flush with water for at least 15 minutes and seek medical attention. Do not operate the vehicle if the fluid in the battery is low. Low battery fluid can cause a higher load on the battery which can generate heat, reduce battery life, and in some cases lead to an explosion. When working on or near the battery, always wear suitable eye protection and remove all jewelry. Battery posts, terminals and related accessories contain lead and lead compounds. Wash hands after handling. Keep the battery out of the reach of children. ADI0709 1. Gently pry between the battery cap and cover as illustrated to remove the cap. Use a cloth to protect the battery case. 2. Check the fluid level in each cell. If it is necessary to add fluid, add only distilled water to bring the level up to the level indicator in each filler opening. Do not overfill. Vehicles operated in high temperatures or under severe conditions require frequent checks of the battery fluid level. Maintenance and do-it-yourself 8-19