Audi A1 2011 ➤ , Audi A1 Sportback 2018 ➤ , Audi A2 2001 ➤ , Audi A3 20 ...
Electrical Equipment General Information - Edition 08.2019
Note
♦ Batteries - A- that have not been used for a long time will dis‐
charge by themselves.
♦ In severely discharged Batteries - A- , the electrolyte consists
almost completely of water, because the acid portion has been
greatly reduced.
♦ Severely discharged Batteries - A- become sulfated, meaning
all of the plate surfaces of the Batteries - A- harden.
♦ The sulfation process may be reversed if a severely dis‐
charged Battery - A- is recharged immediately.
♦ If the Battery - A- is not recharged, the plates will continue to
harden, and the ability to accept a charge will decrease. This
results in reduction of battery performance.
♦ Severely discharged Batteries - A- in vehicles must be re‐
placed prior to delivery. Pre-existing damage cannot be ruled
out.
Procedure
– Check the Battery - A- resting voltage. Refer to
⇒ “3 Battery, Charging”, page 25 .
– Charge the Battery - A- :
♦ -VAS5095A- . Refer to
⇒ “3.1.4 Severely Discharged Battery, Charging with Battery
Charger VAS5095A ”, page 28 .
♦ -VAS5900- . Refer to
⇒ “3.2.5 Severely Discharged Battery, Charging with Battery
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
Charger VAS5900 ”, page 37 .
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
♦ -VAS5903- . Refer to
⇒ “3.3.5 Severely Discharged Battery, Charging with Battery
Charger VAS5903 ”, page 48 .
♦ -VAS5906- . Refer to
⇒ “3.4.3 Battery, Charging with Battery Charger VAS5906 ”,
page 54 .
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Rep. Gr.27 - Starter, Generator and Cruise Control
English 
