What is the normal ampere for battery leakage?
2 Answers
Car normal leakage current is generally 45 milliamperes. Cars have dark current, which falls within the normal leakage range. Here are specific details about battery leakage: Testing: Loosen the screw of the battery negative connection wire. Then, using the milliampere range of a multimeter, connect the negative black wire of the multimeter to the battery negative terminal and the positive red wire to the battery connection wire head to read the dark current value. Normally, this current should not exceed 90 milliamperes. If the dark current reading exceeds 90 milliamperes or even reaches several hundred milliamperes or more, it indicates leakage in the car anti-theft device circuit or other circuits in the vehicle, which should be checked one by one.
I've been driving for over twenty years, and the most annoying issue is battery drain, which I've dealt with several times. Normally, the static leakage current should stay within the range of 20 to 50 milliamps, which is considered a safe value. If it's too high, say over 70 milliamps, the battery might be completely drained overnight, leaving you unable to start the car in the morning. I personally use a multimeter to test it: first, make sure the doors are closed and the engine is off, then wait ten minutes for the system to go into sleep mode; next, disconnect the negative terminal of the battery; set the multimeter to the current measurement mode and connect it between the negative cable and the battery post; if the reading is below 50 milliamps, it's considered normal. If it's higher, it could be due to the anti-theft system or an aftermarket dashcam secretly consuming power. It's advisable to test it regularly, especially during seasonal changes, to avoid being stranded on the road and disrupting your trip.
