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Discussion summary
YOUR RESEARCHCharging battery...how do I stop alarm going off?
Leading reported evidence
Run tracker system operational etc
Performed · outcome unconfirmed
No successful repair reported for this finding.
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0
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1
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Read evidence and context
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Performed · outcome unconfirmed
Absolutely the way to go - I use an Accumate on my Honda and when I first got the 997 last winter, it went in and out of the garage, PCM on and off without the engine running, tracker system operational etc to the point where the battery wouldn't turn the engine over!
Leading evidence: 'Run tracker system operational etc' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect battery' (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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Performed · outcome unconfirmed
Absolutely the way to go - I use an Accumate on my Honda and when I first got the 997 last winter, it went in and out of the garage, PCM on and off without the engine running, tracker system operational etc to the point where the battery wouldn't turn the engine over!
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
If I disconnect the battery to charge it, is there any way to stop the alarm sounding?
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Suggestion
If a car's alternator is working properly and the battery is in good condition, the purpose of the alternator is only to replace the charge caused by cranking the engine to start it.
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Suggestion
Where a charger of this kind is particularly useful is for replacing the power drawn from alarms e.g.
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Suggestion
If a car's alternator is working properly and the battery is in good condition, the purpose of the alternator is only to replace the charge caused by cranking the engine to start it.
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Performed · outcome unconfirmed
Absolutely the way to go - I use an Accumate on my Honda and when I first got the 997 last winter, it went in and out of the garage, PCM on and off without the engine running, tracker system operational etc to the point where the battery wouldn't turn the engine over!
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
Absolutely the way to go - I use an Accumate on my Honda and when I first got the 997 last winter, it went in and out of the garage, PCM on and off without the engine running, tracker system operational etc to the point where the battery wouldn't turn the engine over!
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5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 1 discussions
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Why disconnect it?
If you switch the ingition on, then switch it off but don't remove the key - the alarm shouldn't go off when you disconnect the battery.
The best and easiest way to charge the battery is charge it in the car with a specialist charger. In this way you can leave the electronics e.g. the alarm powered up.
The following link shows the device I have:
http://www.datatool.co.uk/consumer/products/products/index.php?product=battery
This device can be used to charge either a car battery or a motorcycle battery. I originally bought it to charge two motorcycles - a Honda and a Harley Davidson. It comes with a two leads which connect to the output lead of the device. One of these provides crocodile style leads and the other provides a direct connection to the battery. To fit it you connect to a ground point and an always on 12V source e.g. not switched by the ignition. the HD had the lead fitted by the garage and the supplied (fused) lead was attached to the Honda. The advantage of this second arrangement is that the lead can be permanently attached and charging can be done without requiring a door or bonnet to be open. Because of this you can leave the car locked with the alarm enabled by connected through the charger to the mains. The lead can be positioned so that you can get access without it being obvious and without the need to open the car.
The unit can charge the car at a maximum of 1.2 Amps. Compared to a car charger this isn't much but unless you plan to run the battery flat the amount of current isn't relevant. What you want to achieve is a top up of the battery until it is charged and then for the unit to not over charge.
The device is especially useful for a motorcycle battery. Connecting a car charger to a battery like this even for a short period can destroy the battery. It's for this reason why I would always use this in preference to a car charger because the way the unit charges is much gentler. In some ways it is over kill for a car battery to use one of these chargers however the extra cost (they are about forty pounds) provides a peace of mind.
The unit charges using an intelligent algorithm using a voltage limited, constant current source until a trigger voltage is reached. The unit then switches to a constant voltage and the unit charges until the battery is fully charged. it then switches off but monitors the voltage. If the voltage drops to a low point, the unit then switches the charger on again and the cycle repeats. This is useful if you leave the car for months at a time.
The reason why it is suggested that a battery is charged off a car is for two reasons: firstly the voltage of an ordinary charger is unregulated and may damage the electronics and the second is because the battery should be monitored and the unit switched off as soon as it's charged.
These units also recover sulphated batteries. This is where the battery is left to go flat and the plates are partially destroyed. The electronics can recover batteries to some extent. It is however better to never get in this situation by using an intelligent charger to maintain a battery. If a battery is left in a deeply discharged state e.g. over a winter period the damage isn't fully recoverable and the battery cannot be relied upon. If for some reason the car battery is discharged it is still preferable to charge it slowly and the unit does this. The only disadvantage is that it may take some time. If a car's alternator is working properly and the battery is in good condition, the purpose of the alternator is only to replace the charge caused by cranking the engine to start it. For this reason a car battery does not get very discharged. Where a charger of this kind is particularly useful is for replacing the power drawn from alarms e.g. the vehicles alarm or a tracker and where the unit is left for long periods.
Hope this helps and kind regards,
Simon
Absolutely the way to go - I use an Accumate on my Honda and when I first got the 997 last winter, it went in and out of the garage, PCM on and off without the engine running, tracker system operational etc to the point where the battery wouldn't turn the engine over!
The Accumate took 36 hours to recover the battery condition and it is now operating perfectly again.
The beauty of it is that the the battery "crocodile clips" have a push-fit block connector to attach to the charger lead, so it is an easy job to route the cable out near the wipers and lock/alarm the car.
I now alternate between the bike/car on a weekly basis in a matter of minutes.
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