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Home >> Audi >> 2015 >> A4 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Electrical Equipment - General Information) >> 27 - Battery, Starter, Generator, Cruise control >> Maintenance-Free Batteries >> Central Venting System >> Central Venting System

Central Venting System

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To prevent vapors produced by the battery during charging from causing damage or posing a health at risk, vapors are discharged centrally through an opening on the top cover side of the battery.

NOTE:
  • Newer generation batteries have a fine mesh flame trap at the central venting exit point. The "flame trap" is a round fiberglass matt approximately 15 mm wide and 2 mm thick that works like a valve. On the one hand, it allows the gas formed during battery charging to flow out and on the other hand, prevents the explosive gas in the battery from igniting.