Storage of the battery (Audi A6 C5)

If the car will not be used for more than 2 months, the battery should be removed and stored charged. The most favorable storage temperature is from 0°C to +27°C. At these temperatures, the battery discharges the least. It is necessary to charge the battery no later than after 2 months of storage. Otherwise, the battery will become unusable.

If a battery that has been stored for a long time is charged using a fast charger, it either does not accept the charging current or appears to be charged with a so-called surface charge. Such a battery has all the signs of a faulty one.

But before such a battery is considered faulty, it needs to be checked.

29. Measure the density of the electrolyte. If the density of the electrolyte in all cells differs by no more than 0.04 g/ml, the battery can be charged with a conventional battery charger.

30. Check the battery after charging under load (see the relevant chapter). In workshops, special devices are used for this. If the battery voltage is below 9.0 V, the battery is faulty.

31. Check the density of the electrolyte. If the density in one or two adjacent cells is significantly lower (for example, in 5 cells the density is 1.16 g/ml, and in one - 1.08 g/ml), then the battery has a short circuit and is considered faulty.

32. Charge a deeply discharged and sulfated battery, see the relevant chapter.