What is the normal discharge rate for a car?

[TannerAnn]

Under normal circumstances, the discharge rate for a car is generally around 40mA. Of course, this can vary depending on the vehicle model, and some high-end cars may reach up to 80mA. Reasons for excessive discharge: However, if the car's discharge rate is 0.09A or even higher, it is definitely abnormal. This could be due to abnormal discharge in the alarm system circuit or other circuits. In such cases, it is necessary to trace the source and eliminate the issues one by one. Solutions for excessive discharge: The most straightforward method is to remove the corresponding fuse. For example, if removing the alarm system fuse returns the discharge rate to the normal range, it indicates that there is indeed a grounding discharge fault in that circuit, which needs to be addressed promptly.

[VanAnthony]

I see the issue of car battery discharge. Normally, under static conditions, a car battery's discharge should be minimal, typically with only 1% to 3% monthly power loss or leakage current not exceeding 50mA. If the discharge is too rapid, such as difficulty starting after just a few days of parking, there might be a problem. I've personally checked with a multimeter—only when all electrical devices are turned off and the current reading is small can the battery be considered healthy. Common causes include improperly turned-off electrical devices, aging wiring, or modified equipment causing power leakage. Regular voltage checks can prevent such situations, ensuring a longer battery life. Remember, normal discharge ensures the vehicle is always ready to drive without affecting travel plans. If abnormal discharge persists, it's best to seek professional repair to avoid future troubles and prevent premature battery failure, which would require spending on a replacement.

[VonJonathan]

From my years of driving experience, when a car's battery discharge is normal, it's very reliable - it can sit for two or three weeks and still start right up when you turn the key. If the discharge rate is too high, the battery may die after just one week, leading to premature failure. Once I installed a dashcam in my car but forgot to disconnect it, causing a significant power drain that left me unable to start the car after just a few days, forcing me to replace the battery. Under normal conditions, there shouldn't be much activity - the battery should remain quiet without consuming power when parked. I recommend avoiding modifications that increase power consumption or making sure to turn off all lights and the radio before parking. If you're really concerned, buy a simple voltmeter to check - a reading below 50 milliamps is acceptable. Regular battery maintenance also helps, such as cleaning terminals to prevent oxidation. In short, normal discharge ensures convenient travel, while abnormal discharge requires immediate investigation.

[Clark]

What is considered normal car battery discharge? From what I understand, a small monthly power loss is acceptable. Excessive discharge leads to premature battery aging and affects startup. The check is simple: After turning off all electrical devices with the car key, use a multimeter to measure the current - below 50 milliamps is normal. Always remember to unplug aftermarket devices like phone chargers when parking to prevent power drain. I recommend regular battery tests, especially before driving after prolonged parking. If voltage drops below 12 volts or discharge is rapid, visit a repair shop to check for leakage points. Proper discharge maintenance protects battery life, avoiding frequent costly replacements. Simple upkeep saves trouble.