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This isn't a complaint...maybe we could change the forum name to "issues"?
I left my key in the ignition for two days in the off position and just found my battery completely dead. Only Porsche knows what the car was doing that whole time. No outward display of power usage was evident. Nothing was "on".
Anyway, I popped my maintenance charge into a 12V hole and opened the hatch. Now I have the battery on my super-deluxe computerized charger. I selected 10amps...which is supposed to charge the battery in about 6 hours from where it is now.
What should I expect from this battery now that it has been run down?
Should I be doing a 2 amp charge? 20 amps?
I am think of rigging a battery tender junior connector to the battery and plugging my car into the wall as a regular habit.
Oh Dave I feel so used. After we have warned about this so many times, you a frequent poster and reader went and did it (Porsche even warns you in the manual on page 236 of the '06 manual)...but I'll give you credit for confessing. Also consider this from the manual "After the battery is connected or after an completely discharged battery is charged, the
multifunctional PSM light lights up on the instrument panel and a message appears on the onboard computer to indicate a fault. This fault can be remedied with a few simple
steps:
1. Start the engine.
2. With the vehicle stationary, perform a few
steering movements to the left and right and
then drive a short distance in a straight line
until the multifunctional PSM light goes out and
the message on the on-board computer
disappears.
3. If the warnings do not disappear, then:
Drive carefully to the nearest qualified
specialist workshop.
Have the fault remedied.
4. After the warnings disappear, stop the vehicle
in a suitable place, and perform adaptation of
the power windows.
To do this, close windows once with the rocker
switch.
Press front half of rocker switch upwards again
to store the final position of the windows in the
control unit."
Rapid charging can shorten battery life but I'd guess you will be o.k. if you take care of the battery from now on.
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
Always kick a guy when he's down. That's what I say. LOL.
Lead-acid batteries don't live real long when they get drained to stone-cold-dead. But with the new technology, you should be able to jump and go. That alternator will have you up to full charge in no time. The formula is basically CCA/charge amps. So a 550 CCA battery on a 150 Amp charge will take far less time than 10 amps ...
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The search tool is your friend. It is very
likely that your question has already been
answered countless times.Very,very likely.
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Cayman S - a portable amusement park
when the key is in the ignition the car remains ready to be started, so all the electrical c/u's in the car remain energized. The draw on the battery can be as much as a couple of amps, which will kill it fairly quickly. The car draws the least power when it is locked, and the alarm is armed. With those conditions being met, the draw on the battery (with no electrical issues present) is less than 30mA, which should keep your battery alive for weeks if not months.
Oh Dave I feel so used. After we have warned about this so many times, you a frequent poster and reader went and did it (Porsche even warns you in the manual on page 236 of the '06 manual)...but I'll give you credit for confessing. Also consider this from the manual "After the battery is connected or after an completely discharged battery is charged, the
multifunctional PSM light lights up on the instrument panel and a message appears on the onboard computer to indicate a fault. This fault can be remedied with a few simple
steps:
1. Start the engine.
2. With the vehicle stationary, perform a few
steering movements to the left and right and
then drive a short distance in a straight line
until the multifunctional PSM light goes out and
the message on the on-board computer
disappears.
3. If the warnings do not disappear, then:
Drive carefully to the nearest qualified
specialist workshop.
Have the fault remedied.
4. After the warnings disappear, stop the vehicle
in a suitable place, and perform adaptation of
the power windows.
To do this, close windows once with the rocker
switch.
Press front half of rocker switch upwards again
to store the final position of the windows in the
control unit."
Rapid charging can shorten battery life but I'd guess you will be o.k. if you take care of the battery from now on.
I caught the part about needing to power the car via a 12V socket to get the hatch open in the front...a little credit is due here...LOL.
When I plugged in the car, by the way, the passenger window and the interior lights went through a start and stop process until the passenger window was all of the way down.
Once convinced that evil spirits were not in the garage, I hooked up the battery charger. Of course, my cargo area light in the front appears to have burned itself out.
Now I have to perform some kind of ritual madness? Great. If you guys need me, I'll be out re-training my windows.
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
Dave the cargo light in front is controlled by a switch in the driver's compartment. Check that first. I could tell where but I want you to go on a treasure hunt and read the manual...
Linear Mode
