Locked vs Unlocked and battery usage
12-19-2009, 05:52 PM
#16
Three Wheelin'
Avoiding battery rundown/discharge.
As in:
Locking the car is not indicated, but I lock mine when I'm not driving it because I find a habit is easier to maintain than battling absent mindedness.
There may be some small benefit to locking the car as it seems like the systems (computer, blue tooth, GPS) shut down more quickly when it is locked and the interior lighting turns off immediately.
As in:
To avoid battery run-down, always remove the
ignition key from the ignition lock.
ignition key from the ignition lock.
To avoid discharging the battery, always remove
the ignition key from the ignition lock.
the ignition key from the ignition lock.
To avoid discharging the battery, always remove
the ignition key from the ignition lock.
the ignition key from the ignition lock.
There may be some small benefit to locking the car as it seems like the systems (computer, blue tooth, GPS) shut down more quickly when it is locked and the interior lighting turns off immediately.
12-19-2009, 07:47 PM
#17
Poseur
Rennlist Member
Rennlist Member
Although the manual says remove the ignition key, those statements do not in any way imply that LOCKING the car results in less electrical usage. Any competent automotive electrical shop would tell you that a locked car has more systems (alarms, monitors) actively working than one that is unlocked and thus, usage of electrical power is higher.
By this time everyone with a 997 should be aware that leaving a key fully inserted in the ignition lock will drain the car's battery quickly.
Your conclusions are in error.
By this time everyone with a 997 should be aware that leaving a key fully inserted in the ignition lock will drain the car's battery quickly.
Your conclusions are in error.
12-20-2009, 03:42 PM
#18
Burning Brakes
I stand... or in this case sit... somewhat corrected.
According to the manual (page 264, I believe) and unlocked car will continue to put a higher load on the battery with several systems that go into "stand by" mode. However, the car automatically turns those systems off after a fixed period of time and at that point there's no difference in the load on the battery between a locked and an unlocked car. However, locking the car automatically turns off those systems.
Having said all of that... my memory was clearly wrong but I still would swear on a stack of bibles that I read that in a recent Porsche manual but it might have been the manual to a 2006 Cayman S that I drove for about a month a few years ago.
Apologies for any confusion.
According to the manual (page 264, I believe) and unlocked car will continue to put a higher load on the battery with several systems that go into "stand by" mode. However, the car automatically turns those systems off after a fixed period of time and at that point there's no difference in the load on the battery between a locked and an unlocked car. However, locking the car automatically turns off those systems.
Having said all of that... my memory was clearly wrong but I still would swear on a stack of bibles that I read that in a recent Porsche manual but it might have been the manual to a 2006 Cayman S that I drove for about a month a few years ago.
Apologies for any confusion.
09-21-2023, 11:28 AM
#19
1st Gear
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09-21-2023, 12:44 PM
#20
LOL, austrich policy. Spend some money and get a CTEK. No reason to keep disconnecting/reconnecting the battery.
09-22-2023, 02:36 AM
#21
Drive your car once every week or two a you’ll never need to think about these things. 
09-22-2023, 06:55 AM
#22
Racer
I drive mine about 2500 miles, from May to December, and she remains unlocked with the frunk open; just in case the better dies. The battery, interstate, is about 4 years old and I have yet to have a dead battery 🙃
From December to May, she’s left unlocked, frunk remains open with battery tender plugged in.
From December to May, she’s left unlocked, frunk remains open with battery tender plugged in.
