Severely Discharged Batteries

Severely Discharged Batteries

CAUTION!
Risk of injury. Observe warning notes and safety precautions. Refer to --> [ Battery Safety Precautions ] Battery Safety Precautions!

For a battery to be indicated as "severely discharged", the resting voltage must be less than 11.6 V.

CAUTION!
Batteries that have a colorless or light yellow visual indicator must not be tested or charged. Jump starting must not be used!

There is a risk of explosion during testing, charging or jump starting.

These batteries must be replaced.

CAUTION!
• Severely discharged batteries freeze earlier.

• Batteries that have frozen must no longer be used.

• Batteries which have not been used in driving operation for a long time, for example in stored vehicles, discharge themselves.

• In severely discharged batteries, the electrolyte consists almost completely of water, because the acid portion has been greatly reduced.

• Severely discharged batteries become sulfated, meaning that the complete plate surfaces of the battery harden.

• The sulfating process may be reversed if a severely discharged battery is recharged immediately.

• If the battery is not recharged, the plates will continue to harden, and the ability to accept a charge will diminish. This results in reduction of battery performance.

- Check no load voltage. Refer to --> [ Battery, Charging ] Battery, Charging.

- Charge the battery.

Charge battery with the Battery Charger (VAS 5095 A). Refer to--> [ Battery, Charging ] Battery Charger VAS 5095A.

Charge battery with the Battery Charger (VAS 5900). Refer to --> [ Battery Charger VAS 5900 ] Battery Charger VAS 5900.

Charge battery with the Battery Charger (VAS 5903). Refer to --> [ Charging Severely Discharged Battery ] Battery Charger VAS 5095A.