A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
Battery: Description and Operation
Batteries With Central Gas Venting
Batteries With Central Gas Venting
CAUTION:
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Ensure venting system hose is always attached to battery.
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On batteries with central gas venting hose/pipe, ensure that hose does not become disconnected. Only then is the battery able to vent freely.
NOTE: The latest generation of batteries is equipped with a central gas venting system and a fine-mesh "flame trap". Function: The gases produced
during charging escape through a central opening in the top of the battery cover. The fine-mesh flame trap which prevents ignition of the flammable gas
in the battery is also located here. The flame trap comprises a small round fiberglass mat approx. 15 mm in diameter and 2 mm thick. It operates in a
manner similar to a valve, i.e. it allows the gas produced in the battery by gassing to escape.