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Home >> Volvo >> 2008 >> S40 T-5, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Battery, Brakes, Central Electronic Module (CEM), Climate Units, Engine Management System (Ems), Diagnosis - Design And Function (644 Body)) >> Battery (All) >> Terminology >> Battery water

Battery water

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Battery water is distilled or deionized water and must be used to top up the battery if the electrolyte level is low. Regular tap water must not be used because it contains substances which may damage the battery.

For maintenance-free batteries as well as sealed batteries (AGM) it is not possible to fill battery water.