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Originally Posted by qqzj
I think the battery is weak.
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Yes, thanks, I know. I was wondering whether Subaru replaced the batteries under warranty. It could go either way, and I wouldn't be surprised. The thing is, they do not include the battery in the long list of items that ARE covered, and the battery is a pretty obvious component.
I haven't taken it in to the dealer, yet.
However, I did confirm today, after some tests, that it's on its last legs. After a full charge, and with no further load apart from the ECU and radio memories, etc., 16 hours later the battery registered a mere 12.4 volts. It's done.
It should have registered 12.7 volts, or higher. A few hours after removing the charger from my S2000 battery, it registered 13.1 volts. Ten minutes after a 100% charge, the Subaru battery had already dropped to a mere 12.5 volts.
This Subaru Panasonic(?) battery has been poor from day one.
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I have lost power twice due to battery issues. Both times I used battery tender to resurrect it. It works fine, but I do not have much confidence in it.
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I'll bet it does not work fine; I'll bet it tests at low voltage, and like mine, it just barely gets the job done. But, as you say, you cannot trust it. Just like mine, although yours might be a bit better than mine.
Your dealer can put a load tester on it and confirm that you need a new battery.
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Hopefully it will die in three years and I can get a new one.
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I would not wait. Take it in and have it tested. Tell them it failed already, twice.
When they give you a new battery, come back and thank me.
