eli5 What is using my car battery when its parked?

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When i leave my car parked and off for more than a month i often have to charge/replace the battery. However when i disconnect the battery it somehow lasts way longer. I cant think of anything that is on all the time when my car is parked (no alarms, remotes)

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8 Answers

Anonymous 0 Comments

You need a multimeter in-line reading DC milliamperes. If you get a current reading, Disconnect one fuse at a time until it goes away. This is the circuit with your parasitic drain

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