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How Long Does It Take to Fully Charge a Car Battery While the Engine Is Running?

1 Answers
SophiaLee
07/29/25 5:43am
The time it takes to fully charge a car battery while the engine is running depends on the power of the car's alternator and the performance of the battery itself. If the battery is not severely depleted, it can be fully charged within 1 to 2 hours. If the battery is in a deeply discharged state, it needs to be charged using a battery charger. If the car battery is completely dead, relying solely on the alternator to charge it after starting the engine is very slow. In such cases, using a battery charger is the best way to quickly recharge the battery. If the battery remains discharged for an extended period, it can significantly reduce its lifespan. It is recommended that drivers disconnect the negative terminal of the battery when the car is not used for a long time. When possible, driving the car for a short distance allows the alternator to charge the battery, which is beneficial for the battery's health. During maintenance, the battery's voltage and internal resistance can be measured. If these values do not meet the standard, the battery should be replaced promptly to avoid future issues caused by battery failure. In winter, it is advisable to park the car in an underground parking lot or garage overnight to extend the battery's lifespan. The low outdoor temperatures in winter can greatly reduce battery performance. Before winter arrives, it is best to check the battery's voltage and internal resistance. If they do not meet the required standards, the battery should be replaced before winter. The typical lifespan of a car battery is around 4 years. When replacing the battery, choosing an AGM battery can offer a longer service life.
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Can Reducing Tire Pressure Prevent Blowouts?

No. Here are the specific details about tire pressure: Low tire pressure: Increases the contact area with the ground, causing excessive deformation of the cord ply and raising tire temperature. Under intense deformation, the inner airtight layer of the tire generates high heat, leading to separation between the rubber and cord ply, significantly increasing the risk of a blowout. Effects of tire pressure: Tire pressure not only affects the contact area and position between the tire and the ground but also influences the tire's shape, especially the sidewall, which is the weakest part of the tire. Too low tire pressure: When the sidewall contacts the ground, it deforms, causing unstable tire rotation during driving. With insufficient tire pressure, the tire will deform irregularly in all directions on the road surface. Continuous compression and friction on the cord ply can lead to fractures, forming bulges and eventually causing a blowout.
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Can a 4S Shop Restore It to Its Original Condition?

4S shops replace parts for repairs, and after the repair, it will be the same as before. Headlights, front bumpers, and grilles are all original standard parts, so they can fully restore the vehicle to its original condition. More details are as follows: 1. Definition of a 4S Shop: A 4S shop is a type of automotive service that includes vehicle sales (sale), spare parts (spare-part), after-sales service (service), and information feedback (survey). 4S refers to a car service enterprise that integrates these four functions, and it is actually an acronym for the first letters of these four English words. Although the history of China's automotive industry is not as long as that of developed countries, the evolution of service methods has basically followed the same path, which is also an abbreviation of the over 100-year history of the foreign automotive industry. 2. Construction Features of 4S Shops: In terms of the construction of 4S shops, foreign car shops are generally not as luxurious as those in China, and their hardware facilities are not necessarily of a very high grade. The scale of investment is also not necessarily larger than that of domestic car shops. However, the management and service level of foreign car shops are first-class, with meticulous attention to detail. There will never be situations where customers are only allowed to look at the exterior but not enter the cabin. Some car shops even have their own test drive tracks, allowing customers to freely choose and test drive vehicles.
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How Many Points Can Be Deducted from a Driver's License Without Affecting Its Use?

If the cumulative points deducted from a driver's license within a scoring cycle do not reach 12 points, it will not affect its use. Here are the relevant details: Cumulative Points Deduction: If the cumulative points deducted within the cycle reach or exceed 12 points, the driver's license will be confiscated according to the law, and the driver must participate in a seven-day study session on road traffic safety laws, regulations, and related knowledge as required. Usage Regulations: According to the "Regulations on the Application and Use of Motor Vehicle Driver's Licenses," if a motor vehicle driver accumulates 12 points within a scoring cycle, the traffic management department of the public security authority shall confiscate their motor vehicle driver's license. The motor vehicle driver must, within 15 days, attend a seven-day study session on road traffic safety laws, regulations, and related knowledge at the traffic management department of the public security authority where the driver's license was issued or where the violation occurred.
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How to Deal with Hit-and-Run After Scratching a Car?

If someone scratches a car and flees, and the incident is recorded by surveillance or witnessed, the victim can report it to the police. If the traffic police identify the perpetrator, it will be considered a hit-and-run, but generally, the driver's license will not be revoked. A traffic hit-and-run refers to the act of a road traffic accident participant driving away or abandoning the vehicle to escape the scene of the accident to avoid legal consequences. For minor scratch incidents, whether it qualifies as a hit-and-run must be determined through investigation by the traffic police department. More details are as follows: 1. Penalties for hit-and-run after an accident: Fleeing after a traffic accident refers to the act of the perpetrator running away to avoid legal consequences after causing an accident. If the hit-and-run does not constitute a crime, a fine of 200-2000 yuan, 12 demerit points, and up to 15 days of detention may be imposed. If the hit-and-run constitutes a crime, criminal responsibility will be pursued, and the driver's license will be revoked for life. 2. Criteria for a traffic accident to constitute a crime: The perpetrator bears primary or more responsibility for the accident, resulting in serious injury to one or more persons or inability to compensate for damages exceeding 300,000 yuan; or causing the death of three or more persons with equal responsibility. Minor scratches typically do not meet these criteria.
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What are the penalty points for parallel parking?

During the parking maneuver, if the tires touch or press against the parking space boundary or lane lines, 20 points will be deducted; After the vehicle is parked and stationary, if the vehicle body extends beyond the parking space lines, 20 points will be deducted; If the vehicle is not properly aligned within the parking space, 5 points will be deducted; If the vehicle fails to enter the parking space after one forward and one reverse movement, 20 points will be deducted; If the vehicle collides with or scrapes the marker poles, 20 points will be deducted. Here is additional information: Relevant regulations: After the implementation of the new traffic rules, parallel parking no longer uses marker poles, and all parking space boundaries are marked with ground lines. For students learning to drive with a C1 license, the length of the parallel parking space is 1.5 times the length of the vehicle plus 1 meter. In front of the parking space: Drive the vehicle to a position parallel to the parking space, then reverse into the space to the right rear without any pauses. As long as the vehicle is parked within the boundary lines of the parking space, it is considered a pass.
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What is the difference between pearl white paint and ordinary white paint?

Pearl white paint and ordinary white paint have the following differences: Material: Pearl paint is a type of metallic paint. Ordinary white is a solid color paint without metallic luster. From the perspective of long-term usage, white car paint tends to turn yellow over time. At the same time, pearl white is prone to color differences during later touch-ups due to the characteristics of the paint. Cost: Pearl paint has high formulation costs, mainly reflected in labor time, requiring multiple processes from repair, filling, spraying to polishing. Moreover, pearl paint is difficult to spray, with high requirements for paint thickness control and uniformity. Achieving a color-free difference after repair demands high technical skills. On the other hand, the formulation process for white car paint is not as complex, making it less costly than pearl white. White car paint does not contain any reflective or brightening additives, relying solely on the outer clear coat to enhance brightness, making this white more worry-free.
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