4.0 Replacement Battery (Filled or DRY)

Only Porsche approved batteries may be used for replacement. Filled batteries should also be serviced according to the battery check sheet (see enclosed sample). Maximum storage time for dry batteries is 24 months. (Dry batteries are service free and do not require checking until filled with electrolyte.)

To fill a battery, diluted sulfuric acid with a density of 1.28-1.29 g/ml must be used. When filling, make sure acid penetrates battery cells completely.

Lightly shake battery to release air bubbles. After a period of time, recheck acid level and fill to "max" if necessary.

After filling with acid, the battery must initially be charged at 10 amps for 15 minutes or until gassing begins. Afterwards, the same condition applies for filled batteries.

Before installation in a vehicle, battery voltage (refer to 6) and starting capability (refer to 7), must be checked.

New/pre-damaged or defective batteries can be recognized before installation with these measures.

If replacement Battery voltage service/
battery is... Recharging intervals

Filled (not installed) 3 months

Dry Only after filling with acid