Browse

Property For Sale Property For Rent

Used Cars Others

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Others Pet Supplies Sporting Goods Ticket Toys Games Transportation

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

How long should the engine idle to charge a depleted battery?

2 Answers

VonBethany

09/03/25 8:17am

How long should the engine idle to charge a depleted battery? Here are the details: 1. A car can charge its battery while idling in place. If the purpose is simply to replenish the battery, idling is sufficient. 2. For a completely dead battery, charging at 1500 RPM for 20 minutes can provide enough power to start the engine once. Charging at 1500 RPM for 30 minutes can supply enough power for a start the next day. Charging at 1500 RPM for over 60 minutes can nearly fully charge the battery. 3. It's important to note that battery performance is significantly affected by temperature. If the temperature is too low, it's recommended to extend the charging time slightly.

Was this review help?

9

0

Share

McEmily

09/16/25 2:49am

Having driven for over a decade, I've encountered dead batteries multiple times. How long to charge at idle really depends on the situation. Generally, idling for 1-2 hours can charge the battery to about 70-80%, but don't expect a full charge. At idle, the engine runs at low RPM, resulting in lower alternator output and charging current. If the battery is old or deeply discharged, it may take even longer. Last time my battery died, I idled for 40 minutes—it could start the car but didn't last long; a highway drive later fixed it. To check, use a voltmeter: charging voltage above 13.8V means it's charging, below 12V means it's not there yet. Note this is just a temporary solution—prolonged idling wastes fuel and causes carbon buildup. After a dead battery, driving at high RPM for half an hour is more reliable. If the battery keeps failing, replace it ASAP—safety first.

Was this review help?

10

5

Share

Expand All

More Forum Discussions

Reasons for the Rattling Noise When a Car Goes Uphill

Detailed explanation about the rattling noise when a car goes uphill is as follows: The sound comes from the car's valves. There are valves in the engine's valve train, and during normal operation, they produce a rattling sound, but it is usually faint. If the valve sound becomes louder, it may be due to insufficient engine oil, causing the valves to lack lubrication, which increases the noise. Another possible reason is excessive valve clearance. The sound from valves lacking lubrication due to insufficient engine oil. Many car engines use direct fuel injection technology, which requires higher injection pressure. Engines with direct injection technology have a high-pressure fuel pump in the engine compartment, and this pump produces a rattling sound during operation, which is normal. Additionally, many cars will have a rattling sound when the engine hood is opened.

Can I take the motorcycle license test in a different location?

You can take the motorcycle license test in a different location. Here are the details: Documents required for obtaining a motorcycle license. Original ID card, physical condition certificate for drivers, and a one-inch white-background color photo without a hat. After preparing these materials, you can register at the vehicle management office or driving school. Motorcycle license test content. The subject one test is about road traffic safety laws, regulations, and related knowledge, similar to the subject one test for cars; the subject two test includes stake test, slope parking and starting, and single-plank bridge passing; the subject three test content is determined by the provincial public security traffic management department, with no unified standard; the subject four test is about safe and civilized driving knowledge, also a theoretical test.

Where to Find the Motor Vehicle Water Wading Insurance?

Motor vehicle water wading insurance can be found in the insurance policy under the coverage section. Here is more information: Coverage of water wading insurance. Water wading insurance covers the property loss caused by vehicle damage after driving on waterlogged roads. Water wading insurance is an additional auto insurance, and the insured can only purchase it after buying the main insurance. Therefore, water wading insurance is usually bundled with certain main insurances. The difference between water wading insurance and vehicle damage insurance. Different types: Vehicle damage insurance is the first type of main auto insurance, and the insured can purchase it separately, while water wading insurance is an additional insurance that can only be purchased together with the main insurance; Different coverage: Vehicle damage insurance covers the loss of the insured vehicle after an accident, but does not include the loss caused by water entering the engine, while water wading insurance covers the loss caused by water entering the engine; Different claim probability: The claim probability of vehicle damage insurance is higher than that of water wading insurance because vehicle damage insurance has a wider coverage.

Is it necessary to obtain the inspection label for the seventh-year exemption of vehicle inspection?

For the seventh-year exemption of vehicle inspection, it is necessary to obtain the inspection label, and the vehicle also needs to undergo an on-site inspection. Definition of vehicle inspection: Vehicle inspection refers to the annual examination of vehicles that have already obtained official license plates and registration certificates, conducted in accordance with the "Technical Conditions for Motor Vehicle Operation Safety." The purpose is to inspect the main technical conditions of the vehicle, encourage enhanced maintenance, ensure the vehicle is always in good condition, and guarantee driving safety. Vehicle inspection schedule: For passenger vehicles used for commercial operations, inspections are required once a year within the first 5 years. After exceeding 5 years, inspections are required every 6 months. For cargo vehicles and large or medium-sized non-commercial passenger vehicles, inspections are required once a year within the first 10 years. After exceeding 10 years, inspections are required every 6 months. Vehicle inspections are categorized into initial inspections and periodic inspections.

What is the equivalent car displacement for a 500cc motorcycle?

The displacement unit for motorcycles is milliliters, while for cars it is liters. Since 1 liter equals 1000 milliliters, a 500cc motorcycle is equivalent to a 0.5-liter car displacement. Motorcycle displacements can be categorized into five types: Ultra-lightweight. Lightweight. Small-to-medium displacement. Large displacement. Liter-class large displacement. Motorcycle displacements can be divided into five categories: Ultra-lightweight: Below 100cc, including 50-90cc displacements such as 50, 70, 80, and 90. Lightweight: 100-150cc, including displacements like 100, 110, 125, and 150. Small-to-medium displacement: 200-400cc, including displacements such as 200, 250, 300, and 400. Large displacement: 500-900cc, including displacements like 500, 600, 750, and 900. Liter-class large displacement: Above 1000cc, with displacements including 1000, 1100, 1250, and 1300.

Is the Original Factory Paint of a Car Important?

Original factory paint is very important as it primarily protects the car body from corrosion. The original paint refers to the paint used when the car leaves the factory. During the car body painting process, different stages use different coatings, forming distinct layers. On the car body steel plate, there are four paint layers: the electrophoretic layer, the primer layer, the base coat layer, and the clear coat layer. A significant difference is that the original factory paint is a high-temperature paint, baked at least at 130 degrees Celsius, resulting in stronger adhesion of the coating. In contrast, the repair paint used for touch-ups is typically baked at around 80 degrees Celsius, with much weaker coating adhesion. This is because the original primer is applied in the factory's paint shop by immersing the entire car body in a paint bath and attaching it through cathodic electrophoretic deposition—a process that cannot be replicated after leaving the factory. The primer used in touch-ups is usually a post-phosphatization coating, incomparable to the original factory primer, and the application process is vastly different.

Trending Ranking

What is the method to reset the maintenance light on the Bestune X40?

How to clear the maintenance reminder on CS75?

What is the power of the Range Rover New Energy electric motor?

What is the method for cleaning a three-way catalytic converter?

Is Antifreeze Divided into Gasoline and Diesel Engines?

What is a Vehicle Certificate of Conformity?

What is the reason for the P0685 fault code causing the car not to start?

What is the Difference Between Automatic Transmission and Dual Clutch?

What is the relationship between Chevrolet and Chevron?

Can 4S shops do paint touch-ups?

More Forum Discussions

What is the seat height of the GSX250R?

How many hours does it generally take to fully charge a tricycle?

What is the reason for the Nissan Dongfeng key ID error?

Why can't the throttle of a tricycle be increased?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.