my 2006 Outbacks battery discharges after 3-4 days and needs to be jump started, no lights, gadgets, ... were left on, Service says everything is fine ...

Anyone with similar experience ?

You have a light on someplace or something is stuck on. It should take about a month or so to run down a battery by just parking it.

 

It is possible that the battery is bad but thats rare.

 

You need to put a volt meter between the pos battery terminal and the cable. Then you start pulling fuses one by one and see where the metter drops. There will be some parasitic drain for the ECU TCU radio and anything else with a memory.

 

nipper

What Nipper said, but use an ammeter (not a voltmeter) to determine if there's excessive current draw. If the draw is reasonable, then it's possible the battery may not be able to hold a sufficient charge. Perhaps the alternator isn't delivering enough; a loose drive belt could be a simple cause.

sorry my mistake

 

nipper

sorry my mistake

Okay for this time, but just don't let it happen again.

 

 

By the way, parasitic load doesn't usually draw over 30 mA (milliamperes). For a fully-charged battery to become discharged in three days to the point that it won't start the engine would typically require a draw closer to 1/3 amp (333 mA) or more. Since that's better than 10 times the usual max current, an ammeter should easily reveal if there's an excessive load.

Quite a few people have had this problem, i thought i did, until i realized that i bumped the trunk light with my head, and never realized that it was on... i also tend to leave the two map lights on in the front... that'll kill a battery overnight

http://legacygt.com/forums/showthread.php?t=51200&highlight=battery+dies

there's a few things that people have found

the most common, is the radio head unit

then th Defective Engine Control Module....

then a defective map light switch...

 

when i had the problem with my OBXT, i just didn't let the battery charge fully... so it kept dieing... if you're going to do it right, you've got to jump the car, drive a few hundred miles, and then let it sit and idle for an hour or two.. i did that, and i haven't had the problem since...