8 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH987.1 battery drain - Page 1 - Boxster/Cayman - PistonHeads UK
Leading reported evidence
Test parasitic draw, stood and watched the meter
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 · Original poster
I’ve tested parasitic draw, stood and watched the meter with a locked car and it hovers around 45-55mA.
Reconnect battery had woken up the previously dormant tracker
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
Had a few false starts looking for none existent faults until it transpired that reconnecting the battery had woken up the previously dormant tracker, which I assume was faulty given the drain from it.
Leading evidence: 'Test parasitic draw, stood and watched the meter' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Reconnect battery had woken up the previously dormant tracker' (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.
Reconnect battery had woken up the previously dormant tracker
Suggestion or failed attempt
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 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
Had a few false starts looking for none existent faults until it transpired that reconnecting the battery had woken up the previously dormant tracker, which I assume was faulty given the drain from it.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Reconnect battery had woken up the previously dormant tracker
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
Had a few false starts looking for none existent faults until it transpired that reconnecting the battery had woken up the previously dormant tracker, which I assume was faulty given the drain from it.
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.
PistonHeads: 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: 20261027T084359Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Bit of a strange one this I’m struggling with. I’ve a 2005 3.2 987.1 Boxster. Battery was flat around a month ago and as it was reasonably old I replaced it. The issue is I keep getting a flat battery. I can drive it, park it and then within 48hrs there’s insufficient juice to start it.
I’ve tested parasitic draw, stood and watched the meter with a locked car and it hovers around 45-55mA. This seems about right and would take some time to deplete a fully charged battery.
Next up is the charging system - when I first start the car I’m seeing around 14.3v across the battery. As the car warms up this gradually drops to around 13.5v which seems low to me?
Any ideas? I’m starting to get a bit cheesed off!
TIA!
Background current draw should be below 10mA. This is with doors closed, frunk light disabled (assuming frunk is open to access the battery) and car shutdown for at least 30mins so that a lot of the standby circuitry goes to sleeps.
Typical drain is from tracking devices, especially is the subscription has lapsed.
gsewell said:
Background current draw should be below 10mA. This is with doors closed, frunk light disabled (assuming frunk is open to access the battery) and car shutdown for at least 30mins so that a lot of the standby circuitry goes to sleeps.
Typical drain is from tracking devices, especially is the subscription has lapsed.
Thanks for that, it has got an active tracker so I’m expecting that. I’m not really concerned about the level of the parasitic draw, it would need to be significantly higher to drain the battery in 24hrs, something like 2A. I understand in some modern cars the normal range can be up to 80mA!
LunarOne said:
Could it be that your new battery is faulty? It's not unheard of!
It’s possible, although I’ve had it tested and it passed. I think the next test is to charge it then isolate it for 8hrs or so and see if there’s any voltage drop, if it’s in the car for 8hrs there is a recordable drop in voltage.
832ark said:
gsewell said:
Background current draw should be below 10mA. This is with doors closed, frunk light disabled (assuming frunk is open to access the battery) and car shutdown for at least 30mins so that a lot of the standby circuitry goes to sleeps.
Typical drain is from tracking devices, especially is the subscription has lapsed.
Thanks for that, it has got an active tracker so I’m expecting that. I’m not really concerned about the level of the parasitic draw, it would need to be significantly higher to drain the battery in 24hrs, something like 2A. I understand in some modern cars the normal range can be up to 80mA!
This is what happened to mine. About the same level of drain. I bought the car and unbeknown to me, it had a tracker. No probs until the battery was disconnected to upgrade the head unit. Had a few false starts looking for none existent faults until it transpired that reconnecting the battery had woken up the previously dormant tracker, which I assume was faulty given the drain from it.
This is a source reference. Confirm exact model applicability in the original material.
