Originally Posted By: horse123
Zero draw... maybe 1 milliamp from one of the main positive cables going to the battery.
Nothing was left on, I don't have alzheimer's thanks.
If it doesn't happen again after sitting for a couple days, should I assume it was a one-off thing where maybe the radio or something didn't fully shut off for some reason?
Just because you think you don't have alzheimer's, doesn't mean that you might have left a glovebox slightly unlatched or a visor light running.
I don't believe your measurement. Typical parasitic draw is between 5-30mA, unless its something like my old MB diesels, which only have a clock to keep up.
A vehicle with a 30 mA drain and a fully-charged 70 amp-hour reserve capacity battery will last around 23 days. But if the battery starts at a lower state of charge, which could have been due to short tripping, using a dome light or radio, etc., it can easily drop into the two week range.
Obviously most cars don't have a 30mA draw, since lots of cars can sit for a month or more and start OK. But it doesn't take much to get there.
Does the car have an immobilizer or alarm?