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YOUR RESEARCHBattery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace maintainers
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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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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1
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Performed · outcome unconfirmed
Swapped maintainers with another vehicle and problem followed maintainer.
Battery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Replace maintainers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect car' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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 · Original poster
But my question is: do I risk anything else by totally disconnecting the car from power for that couple minutes it’ll take to switch from old to new?
Battery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reconnect battery ...then try turning
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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
I'm wondering IF there's a way to tell IF the radio has a code at all....other than disconnecting and reconnecting the battery ...then try turning on the radio?
Battery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use a few years ago, connected a jumper
Suggestion or failed attempt
No successful repair reported for this finding.
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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.
Discussions that contain suggestions
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Suggestion
I don't know if the "indi" tire & battery shop that I used, a few years ago, connected a jumper to the cig lighter or just changed out the old battery for a new one......all I do recall is that the radio worked fine afterwards without any fussing around.
Battery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reconnect battery ...then try turning
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I'm wondering IF there's a way to tell IF the radio has a code at all....other than disconnecting and reconnecting the battery ...then try turning on the radio?
Battery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use a few years ago, connected a jumper
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I don't know if the "indi" tire & battery shop that I used, a few years ago, connected a jumper to the cig lighter or just changed out the old battery for a new one......all I do recall is that the radio worked fine afterwards without any fussing around.
Battery Replacement Question - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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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.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I’ve got an old Diehard in the Box, and, unbelievably, that sucker’s been in there since 2014. I’ve got a friend who, for a fee, allows me to winter-store the car in her garage (she heads to Florida for the season) and, while doing so, I’ve had the Ctek maintainer on the whole time. The car started fine last December when I went to move it over there, but the Ctek’s been giving me a red light and indicating virtually no charge. So I guess a battery replacement is finally in order.
After 9 years, I honestly don’t remember what I did last time, but I don’t recall worrying about maintaining power in the system while making the battery switch. I ask because I’ve done some searches and have gotten inconsistent results on the issue—mine is an ’01 S if that matters. I know the radio code and can obviously reset that without a problem. But my question is: do I risk anything else by totally disconnecting the car from power for that couple minutes it’ll take to switch from old to new?
I don’t have the cigarette lighter attachment, but if I was worried about it, with the Ctek could I just hook it up to the post in the fuse box and some door frame metal? And, if so, do I just leave it on the same Ctek setting that I keep it on to maintain the battery over the winter? TIA
You can re-calibrate the E-gas but as JFP said it will relearn everything (except the radio code) on its own just fine.
There is something with the windows the one touch up down feature it has to be re-calibrated (I think) it should be in you owners manual.
I'm wondering IF there's a way to tell IF the radio has a code at all....other than disconnecting and reconnecting the battery ...then try turning on the radio?
I don't know if the "indi" tire & battery shop that I used, a few years ago, connected a jumper to the cig lighter or just changed out the old battery for a new one......all I do recall is that the radio worked fine afterwards without any fussing around.
there is no programming of a battery on the 986. The car's ECU will just think its 'new' and erase your adaptive memory, so when it starts up, itll start idling and learnign the temperature outside and all, no big deal.
Yep - def thinks time for a new battery and as others said very simple procedure on a 986.
That said... might throw your C-tek maintainer on another vehicle to ensure it too is not bad.
Had one couple years back make me question if I had a bad cell on a (newer) battery.
Swapped maintainers with another vehicle and problem followed maintainer.
Alas that C-tek had bitten the dust after ~12-15 years which was pretty good in my opinion.
Good luck
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