2000 Saab 9-5 Owner's Manual - Page 177

Car care and technical information 177 Battery WARNING • The battery emits hydrogen which, when mixed with the oxygen in the air, forms a highly explosive gas. Avoid causing sparks and keep open flames well away from the vicinity of the battery. • The battery contains corrosive sulfuric acid. Always wear a face mask or goggles when working on the battery. • If battery acid gets into the eyes or splashes the skin or clothing, wash affected area liberally with water. If acid gets into the eyes or a large quantity makes contact with the skin, seek medical help. The battery is provided with a cover to protect it from radiated heat. If the battery is exposed to high temperatures, its life will be shortened. To remove the cover, pry out the edge a little, located at the rear of the cover. The cover fits the standard battery installed in the car. If a new battery is to be fitted, make sure that its dimensions are the same as the standard one. The fluid level and the charge level should be checked regularly. The best way to check the charge is to use a hydrometer. NOTE Never use tap water to top up the battery. Tap water contains salts and minerals that accelerate the corrosion of the battery electrodes, which can shorten the life of the battery. The specific gravity of the electrolyte when the battery is fully charged is 1.28. A specific gravity of 1.18 roughly indicates a 50% charge (see also page 230). Correct fluid level in battery If frequent short journeys are made, the battery may need to be given a booster charge. This can be done either using a battery charger or by taking the car for a long run. A car with a standard equipment specification and a fully charged battery can be left for up to 40 days and still have a sufficient charge for starting. If extra equipment is fitted, such as a car phone, the charge may only be sufficient for about 15 days. NOTE A discharged battery can freeze and fracture. Batteries should therefore always be stored away from frost. IB1173