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can dead batteries be revived?; non-OEM replacement. etc.

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I've an '07 S w/ ~15K miles that is in storage. I managed to totally kill the battery by leaving the front hood unlatched. First, can that dead battery be revived by charging, or is it toast? Second, even local Porsche dealer does not sell Porsche-branded battteries; they sell Interstate. Does the forum have a preference for non-OEM batteries? Finally, I'm planning to leave the car with a s dead battery for the remainder off the winter and research on the forum suggests that's fine. is it?


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If you are going to let it sit, I would disconnect the dead battery from the car, even if you don't remove it.

Some batteries can be recharged and will provide years more of trouble free service. On the other hand some batteries are gone. It doesn't hurt to try and charge them but if they show signs of weakness they should be replaced.

As for a good battery, there are a couple battery threads for you:


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  • 1 month later...

Updating my original post. I totally killed my battery by leaving the trunk open while in storage. Car had about 14,000 miles. I removed the dead battery, got some life back in it using a Sears non-commercial charger, then took it to a service station. They finished the charge and it tested "good." Rinstalled and works fine. Only hassles was were learning about how you cannot remove the key when the battery is dead and reprogramming the radio statioins.

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