battery and maintainer question

[lkchris]

Originally Posted by rfuerst911sc

Will these cigarette lighter input maintainers hold/keep the radio codes and stop any ECU issues when changing the battery ? Can you keep these plugged in while you change the battery ? I assume if the answer is yes you should be careful with the positive battery cable in regards to hitting chassis metal while doing a battery switch ?

Your Porsche interrupts power to the cigarette lighter when ignition is off ... hence these are of no use.

[Gilles]

Originally Posted by lkchris

Your Porsche interrupts power to the cigarette lighter when ignition is off ... hence these are of no use.

Lkchris,

Actually the lighter on my '07 is always hot and last night I sacrificed a 12VDC working light to use the lighter adapter and was able to use the battery charger to open the trunk.

Before this, I removed the front passenger tire and the liner, searching for the emergency cable but was not there (and I looked everywhere), then my neighbor showed up with a utube video showing that the driver side is where the cable is located, thankfully we decided to use the lighter option and worked instantly.

[Chuck W.]

Originally Posted by lkchris

Your Porsche interrupts power to the cigarette lighter when ignition is off ... hence these are of no use.

I have an '01 and have used the cigarette lighter for the Battery Tender for several years now. Mine stays hot with the ignition off.

[Luckyed]

Originally Posted by Chuck W.

I have an '01 and have used the cigarette lighter for the Battery Tender for several years now. Mine stays hot with the ignition off.

+1 on that!!

[JFP in PA]

Originally Posted by lkchris

Your Porsche interrupts power to the cigarette lighter when ignition is off ... hence these are of no use.

For many years, Porsche has designed their lighters so they are "always hot", regardless of the ignition switch position. This was done to facilitate the use of battery maintainers which plug into the lighter socket inside the car, and include a small opening in the driver's door lower seal to allow the electric cord for the maintainer to exit the vehicle while the car is locked and the alarm is on.

[mikefocke]

Originally Posted by lkchris

Your Porsche interrupts power to the cigarette lighter when ignition is off ... hence these are of no use.

As JFP says for US versions though I'm not sure about models for overseas. I charged mine ('99 and '01S) with a Porsche branded cTek for 5 years through the lighter connection and it started normally every time even in conditions when I had to brush off 8" of snow from the car cover.

I switched from generic to AGM just for fun. It was in a US made era so my experience isn't helpful re the Optima quality.

BTW, the CCA specs for the TIP are more than the manual.