8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHow quickly can a battery go flat?
Leading reported evidence
Use so
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
The car does 1000 miles month , so is regularly used so that is not the excuse.
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.
Unsuccessful attempt · Original poster
Old moll replaced by Bosch Silver and car returned to health. Did not help that procedure shown on leaflet in fuse box cover, differed from the procedure in the manual to ensure alarm does not go off.
Leading evidence: 'Use so' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace by bosch silver and car returned' (1 discussions). For that action, 0 discussions report a resolution and 1 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.
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 · Original poster
The battery was run flat three months ago when the alternator failed but appears to have been in good health ever since.
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
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
Seems like they last longer the more you use the car.
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
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 put mine on a charger/conditioner whenever the car is not in use for a day or two.
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 report an unsuccessful attempt
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.
Unsuccessful attempt · Original poster
Old moll replaced by Bosch Silver and car returned to health. Did not help that procedure shown on leaflet in fuse box cover, differed from the procedure in the manual to ensure alarm does not go off.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace by bosch silver and car returned
No successful repair reported for this finding.
0
Reported fixes
1
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report an unsuccessful attempt
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.
Unsuccessful attempt · Original poster
Old moll replaced by Bosch Silver and car returned to health. Did not help that procedure shown on leaflet in fuse box cover, differed from the procedure in the manual to ensure alarm does not go off.
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.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 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: 20261026T181445Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I drove my wifes Targa on Friday and do not remember the battery having low charge. This Monday evening the battery is completely flat, the needle doesn't come off the stops!, and the lights were off, doors closed, the only question being whether the alarm has being going off.
Am going to call the RAC out once I have time to drive car ( or transport car to garage ).
What do you think? Has anyone else had a battery go this quickly?
The battery was run flat three months ago when the alternator failed but appears to have been in good health ever since.
Yours Perplexed
Well the simple answer is
If it is a 45 amp hour battery it is 45 hours if the draw is 1 amp - and any ratio similar - ie 135 hrs at .3 amp.
Not much help but that is the answer.
If the alternator has failed it is 10 minutes from startup - I speak from experience here. When my old battery was on the way out, it would go flat after a couple of days of not being driven.
Also old batteries can spontaneously fail, especially common when the first cold night of winter kicks in. A friend of mine was driving from Suffolk to Devon, stopped off at South Mimms services on the M25 and when he came back to the car a few minutes later the battery had totally died!
I find a lot depends on useage too. Seems like they last longer the more you use the car.
It also seems, from many posts on Renntech, that after 4 years you are living on borrowed time with the Porsche (Moll) batteries.
Old moll replaced by Bosch Silver and car returned to health. Did not help that procedure shown on leaflet in fuse box cover, differed from the procedure in the manual to ensure alarm does not go off.
My wifes Targa only responded to the key fob being blipped. However once done bonnet opened and battery replaced.
Bosch comes with four year warranty so should see us out till she moves to her next car.
Thanks for all the advice
Glad to hear it is now sorted with a decent battery. My Porsche original lasted less than 3 years. The car does 1000 miles month , so is regularly used so that is not the excuse. I got a Varta as the bosche wasn't available locally and cost only £80 (with 3 years warranty) compared to OPC £250 and 2 years warranty. Pretty poor I think for a car less than 3 years old costing £108k new.
I put mine on a charger/conditioner whenever the car is not in use for a day or two.
If not used for a few days, I have noticed that the battery does lose some of its charge.
This is a source reference. Confirm exact model applicability in the original material.
