Yes, revving the engine in neutral can provide a minimal charge to the battery, but it is an extremely inefficient and potentially harmful practice, especially under UAE conditions. The alternator does generate more current at higher RPMs, but modern voltage regulators in GCC-spec vehicles like the Toyota Land Cruiser or Nissan Patrol are designed to maintain a steady charge, making prolonged neutral revving pointless for a significantly depleted battery. According to general vehicle maintenance guidelines referenced by the RTA Dubai and driving advice from the MOI UAE, proper battery care is essential. For a typical sedan like a Toyota Camry in the UAE, relying on this method ignores the real total cost of ownership (TCO): a new battery costs around 400-700 AED, the extra fuel burned (at roughly 2.50 AED/l for Special 95) yields negligible charge, and it causes unnecessary engine wear. The effective cost per km for this "charging" method is unjustifiably high. More critically, in summer temperatures above 40°C, a weak battery is often a symptom of other issues like prolonged air-conditioning use or terminal corrosion from dusty roads. The correct approach is regular driving on highways like Sheikh Zayed Road, which allows the alternator to charge efficiently. For vehicles parked for extended periods, using a maintenance charger is the recommended solution by local specialists, as idling or revving in neutral may not meet the high electrical demand of GCC-spec vehicles' enhanced cooling systems and can lead to faster battery degradation.
