TT Quattro Roadster V6-3.2L (BHE) (2005)
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Battery: Procedures
Battery, Charging
Battery, Charging
WARNING:
Danger of explosion.
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Batteries produce explosive gasses while being charged.
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Keep open flames and sparks away and DO NOT smoke near batteries.
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The battery charger MUST be turned off when connecting or disconnecting the cables at the battery.
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Battery cell caps must NOT be removed while charging.
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Boosting" a sulfated battery a high charging rate can cause an explosion.
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Ensure that battery is charged in a well ventilated area.
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Precision tools must not be kept in the same room where batteries are being charged. Tools may corrode due to chemical reaction.
Special tools and auxiliary items needed
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Battery Charging Station: Midtronics INC-940
CAUTION:
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Audi TT equipped with the 3.2L V6 engine are equipped with an Absorbed Glass Mat (AGM) battery that must not be charged with a
conventional battery charger. Only use Battery Charging Station INC 940.
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Voltage and current limits associated with conventional chargers may cause overheating and subsequent damage to AGM battery.
Battery charger, connecting
NOTE:
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Before charging, battery must have a minimum temperature of 10 degrees C (50 degrees F)
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It is not necessary to remove battery from vehicle or disconnect battery terminals.
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Charging voltage must not exceed 14.4V.
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Always follow the battery charger operating instructions
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After charging, confirm battery no load voltage and electrolyte specific gravity (where applicable) before reuse in vehicle.
CAUTION:
Before beginning repairs on the electrical system
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Switch off all electrical consumers.
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Switch ignition off and remove ignition key.
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Connect battery charger to battery, positive to positive (+), negative to negative (-).
Vehicles with conventional lead acid battery:
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Adjust charging rate according to battery capacity See Midtronics INC-940 Instruction Manual.
WARNING: If battery begins gassing (boiling) violently when charging, REDUCE charging rate immediately.
Vehicles with AGM battery:
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Select AGM setting and adjust charging rate according to battery capacity See Midtronics INC-940 Instruction Manual.
Charging totally discharged batteries
Batteries that have not been used for long periods of time begin to self discharge (e.g. vehicles in storage). Under these conditions, the battery begins to
sulfate and the surface area of the battery plates hardens. A battery is considered to be totally discharged if the no load voltage is below 11.6 volts. No
load voltage, checking.
On totally discharged batteries, the electrolyte (sulfuric acid/water mixture) is almost all water. When these batteries are exposed to freezing
temperatures, permanent damage to the battery plates (and housing) results.
If a totally discharged battery is charged quickly ("quick charged" or "boost charged"), only a surface charge is accepted (if at all). The battery may even
test OK immediately after charging. However, in this case the sulfating process continues inside the battery. Once a battery begins to sulfate, it's ability to
further accept a routine charge (from the Generator) and provide adequate load and reserve performance will diminish until the battery malfunctions.
Totally discharged batteries must only be slow charged and re-tested.
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Apply a maximum charge current that is no more than 10% of battery capacity, e.g.: for a 60Ah battery, max. charge current = 6 amps.
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Charge a totally discharged battery for a minimum of 24 hours.
CAUTION: Never "quick charge" a totally discharged battery. Effective charging will not take place, despite what appears to be a sufficient
