27-24
Procedure for charging totally discharged,
sulfated batteries
Totally discharged, sulfated batteries must be
charged with a low charging current as follows:
- Set charging current to approximately 5% of
battery capacity, (e.g., for 60 Ah battery,
charging current should be about 3 amps).
To charge the battery Page 27
-22
. The
charging voltage must not exceed 14.4 volts.
Never fast-charge totally discharged batteries.
Note:
Once the battery is reconnected, check and
activate the vehicle's electrical equipment (radio,
clock, comfort and convenience features, etc.) as
described in this Repair Manual or the Owners
Manual.
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27-25
Fast-charging/boost starting
Notes:
Batteries should be fast-charged (charging
current approximately 20% of battery capacity
and higher) only under exceptional
circumstances.
Batteries are damaged by fast-charging.
Boost starting is also possible using the
VAG1472 starter/charger.
The VAS1992 battery-starter provides boost
starting for vehicles with totally
discharged/weak batteries without connection
to line voltage. Depending on the outside
temperature and battery capacity, 15-30
starting operations can be completed.
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