This current can be significant enough to drain the battery over time, especially if the vehicle is not driven regularly. Turn off all consumers in the car (lights, radio, air conditioning, usb devices in the cigarette lighter) The key to long life for any battery is to make sure battery voltage doesn't drop below 12.4 volts
Leakage Current: Testing, Causes, and Safety Tips
When that happens, sulfation begins to diminish both capacity and performance.
A car battery can be drained while it is off due to factors like interior lights left on, faulty wiring, bad fuses, corroded alternator diode, electrical glitches, ineffective charging.
A car battery, when the vehicle is off, should ideally draw a minimal current—typically between 20 and 50 milliamps (0.02 to 0.05 amps) This parasitic draw powers critical systems like security, memory, and electronics but excessive draw above 75 milliamps can deplete the battery prematurely. 2 assuming the car is in prefect order, the only drain on the battery, when the ignition is off, is from ancillary systems Does anyone have an estimate of what the drain is from
I suspect it depends also on how old the car is, as these systems are improved and miniaturized every year. To measure the leakage current, you need a multimeter with the ability to measure direct current (amperes) The procedure in brief is as follows
