10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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Discussion summary
YOUR RESEARCHProblem w/ Optima Battery
Leading reported evidence
Replace under the 36 month warranty
Suggestion or failed attempt
No successful repair reported for this finding.
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0
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1
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Suggestion · Original poster
So did you get them all replaced under the 36 month warranty?
Leading evidence: 'Replace under the 36 month warranty' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace under the 36 month warranty' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Reset so at some point the battery was completely flat
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Suggestion · Original poster
When I got the car back from the dealer the clock was reset so at some point the battery was completely flat.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
He or she can load test the battery to determine the condition.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My car is at the dealer for some maintenance (not battery related) and the tech noticed that the car had trouble starting. He thinks the battery is on the way out. I just installed a brand new Optima 34R a couple of months ago so it seems a little strange if the battery is not holding a charge. Anyone have a similar experience? Is it an Optima thing, or Porsche thing or something else?
Hmmm.....they got me with the "you need a new battery" thing earlier this year. Only afterwards did I discover that the old battery was less than a year old and therefore still under warranty.
I'm on my third optima red top in 18 months. I don't think Porsches like optimas much. When my current optima buys the farm, I'm going with an Interstate.
So did you get them all replaced under the 36 month warranty? Trying to find a local brick and mortar that carries a 34R is impossible. At your rate you will never run out of warranty! I wonder if there is something in the 996 which drains the battery while the car is off? Radiator fan?
My car - a lowly 993 - has had it's electrical system checked out and no faults/unusual loads found. It only gets about 2,500 miles per year and has a battery charger/maintainer keeping a watchful eye, but that last optima lasted about four months.
Battery was just at 12 V without load and with a load it fell to 11 V. When I got the car back from the dealer the clock was reset so at some point the battery was completely flat.
EDIT: Turns out the problem was NOT due to the battery. The interior lights were staying on for several hours which led to the discharge. Once I shut the lights off, the Optima has performed without problem.
I think one of the keys to making the battery last is a maintainer. Porsche will not warranty a new battery if you have less than 7000 miles/year on the car. I went with interstate 850CCA and their maintainer (plug in under the hood). Works like a charm and a little lighter than stock.
I have had a bad run with the red top before. Not on my C4 but on a previous car. They are a great product but just like anyone else, they can have a few bad eggs from time to time. I went through 3 in a row before we got a good one. I looked at everything in my car to make sure it wasn't me. I had a motor from Japan imported so God only knows what it might of been if it wasn't the battery.
Good luck though, this sounds more like a maintainer issue thna a bad battery.
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