Checking the battery (Mazda Capella GC)

Inspect the battery for damage, such as cracks or a broken case or cover, which may allow electrolyte to leak. Determine the cause of the damage and repair it or replace the battery if necessary. Remove traces of corrosion with a solution of soda and water.

Check the specific gravity of the electrolyte, and make a density correction depending on the temperature of the electrolyte.

If the electrolyte density is less than 1.100 g/cm³, slowly charge the battery with a current of 5 A for no more than 14 hours, then test the battery under load.

If the electrolyte density is between 1.100–1.220 g/cm³, recharge the battery.

If the electrolyte density is more than 1.220 g/cm³, test the battery under load.

To test the battery under load, discharge the battery with a discharge current of 200 A for 15 seconds, then check the voltage at the battery terminals.

If the voltage is more than 9.6 V, the battery is good and can be used.

If the voltage is between 9.6-6.5V, fast charge the battery, then test it under load.

Caution: If the battery voltage remains below 9.6 V after recharging, it must be replaced.

If the voltage is less than 6.5V, the battery is faulty and needs to be replaced.