Volvo 2005 S40 Manual page 96

Driving habits and conditions, climate, the number of starts, etc. all affect the service life and function of the battery.
In order for your battery to perform satisfactorily, keep the following in mind:
Check the fluid level in each cell in the battery every 24 months or every 15,000
sooner. The fluid should be at the level shown in the illustration above (A). Do not overfill.
Use a screw driver to open the caps and a flashlight to inspect the level.
If necessary, add distilled water. The level should never be above the indicator (A).
The fluid level should be checked if the battery has been recharged.
After inspection, be sure the cap over each battery cell is securely in place.
Check that the battery cables are correctly connected and properly tightened.
Never disconnect the battery when the engine is running, for example when changing the battery.
The battery should be disconnected from the vehicle when a battery charger is used directly on the battery.
1. More frequently in warm climates.
WARNING!
PROPOSITION 65 WARNING!
Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the state of
California to cause cancer and reproductive harm. Wash hands after handling.
pg. 154 Battery
Battery replacement
1. Switch off the ignition and remove the key.
2. Unscrew the cover over the battery.
3. Wait at least 5 minutes after switching off the ignition before disconnecting the battery so that all information in the
vehicle's electrical system can be stored in the control modules.
4. Remove the cover and unscrew the front side of the battery box using a screwdriver.
1
miles (24,000 km), whichever is