How to Detect Whether a Car Battery is Leaking Electricity?

[StOscar]

Methods to detect whether a car battery is leaking electricity: 1. Turn off all electrical devices in the car, remove the negative terminal of the battery, connect one end of the test light to the negative terminal and the other end to the battery cable. If the light turns on, it indicates a leakage point. 2. Measure the battery voltage with a multimeter. Causes of car battery damage: 1. The ignition system continues to operate after the engine is turned off. 2. The multimedia or air conditioning system is not turned off before shutting down the engine. 3. Prolonged use of electrical devices after turning off the engine. 4. Frequent or prolonged ignition attempts. Car battery maintenance methods: 1. Avoid parking the car in an open parking lot for extended periods under direct sunlight. 2. Avoid continuous vehicle starting. 3. Regularly inspect battery components and connecting wires. 4. Avoid using electrical devices in the car after turning off the engine.

[LeilaniRose]

I recently checked my car battery for parasitic drain myself, and it's quite a simple method. First, turn off the engine, lock the doors, and wait for 20 minutes to let the car enter sleep mode. Then, open the hood and disconnect the negative terminal of the battery. Set the multimeter to the current measurement mode and connect it in series between the negative cable to read the quiescent current. The normal value is generally below 50 milliamps; if it exceeds 100 milliamps, it indicates a parasitic drain. At this point, you need to pull out the fuses one by one to troubleshoot—pull one out, put it back, and then take the reading. The circuit where the current suddenly drops is the source of the drain. Common issues include aftermarket audio systems or dash cams, or possibly aging door sensors. Remember to wear insulated gloves during the test—safety first.

[StMaximus]

Last week my car battery was dead and couldn't start the engine. After checking, it turned out to be a power leakage issue. Here's how I handled it: First, made sure all lights and multimedia were turned off, locked the car and left it for 15-20 minutes. Then asked a car-savvy friend to measure the battery current with a multimeter, which showed higher than normal readings. We slowly pulled out fuses from the fuse box one by one, and found the short circuit was in the dome light wiring. After repair, the battery has been working perfectly since. Regular maintenance tip: check monthly for corrosion or oxidation on battery terminals - keeping them clean helps prevent power leakage.

[VanLillian]

Detecting battery leakage is not difficult, just follow these three key steps. First, turn off the engine, close all doors and windows, and lock the car to allow it to enter sleep mode. Second, disconnect the negative terminal of the battery and connect a multimeter to measure the current. Third, the normal value should be within 50 milliamps; if it exceeds this, check the source by pulling out fuses one by one. Common leakage points include stuck glove box lights or aging modified wiring. After identifying and fixing the issue, measure the current again to ensure it's normal. It's best to have a battery tester on hand for more accurate results.