TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
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Battery: Service and Repair
Battery Charging
Battery Charging
WARNING:
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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.
CAUTION:
Before beginning repairs on the electrical system:
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Obtain the anti-theft radio security code.
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Switch the ignition off.
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Disconnect the battery Ground (GND) strap.
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After reconnecting battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according
to Owner's Manual.
Special tools, testers and auxiliary items needed
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Battery charger: Christie Automotive 400 QDD or equivalent.
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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Always follow the battery charger operating instructions
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Quick charging causes battery damage. Batteries should therefore only be quick charged in exceptional circumstances (e.g. for boost starting).
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If a totally discharged battery is quick charged, it may not accept the charge current, or may appear to be fully charged when it has in fact only
taken a "surface charge." The battery may appear to be OK.
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After charging, confirm battery no load voltage and electrolyte specific gravity before reuse in vehicle.
Battery, charging
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Switch off battery charging unit.
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Switch off ignition.
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First disconnect battery Ground strap and then positive cable from the battery.
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Connect positive cable of battery charging unit to battery positive terminal.
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Connect battery charging unit negative cable to battery negative terminal.
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Set charge current of battery charging unit according to battery capacity. The current should be about 10 % of the battery capacity. For example,
for a 60Ah battery, set the charge current to about 6A (Amperes).
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Switch on battery charging unit.
Notes on totally discharged batteries:
Batteries that have not been used for a long time (e.g. in vehicles that have been stored) will gradually become discharged.
A battery is totally discharged when the no-load voltage has dropped to below 11.6 V. Measuring no load voltage.