Connecting new battery questions

[bcgreen]

I am researching on diy for a new battery for my 2013 base Boxster. I have my CTEK hard wired to the battery cables making it quick and easy to connect and disconnect every time I go out as this is my dd because this battery is on its last leg.
i don't want to lose my settings when I remove the battery, will leaving the CTEK connected to the battery cables save the settings?
I see some people use the cig. lighter socket but I am hard wired with eyelets.
I am will probably go with Interstate so nothing different than the oem, will I need it coded?

[Tom]

Those CTEK units will only charge when connected to a battery. There's a good chance your CTEK will stop delivering power once you remove the old battery and before you get the new one in, in turn risking the loss of settings, etc. There is supposed to be a way to over-ride that so it supplies voltage with or without a battery, but I've never had luck with that on my similar Porsche-branded units. A safer bet would be to hook up another car/battery via jumper cables to the battery posts and keep them powered while you change batteries -- just be safe about it (PPE, grounding at chassis, etc.).

[bcgreen]

A safer bet would be to hook up another car/battery via jumper cables to the battery posts and keep them powered while you change batteries -- just be safe about it (PPE, grounding at chassis, etc.).

Won't you lose settings even if you disconnect for 3 or 5 seconds

[Tom]

A safer bet would be to hook up another car/battery via jumper cables to the battery posts and keep them powered while you change batteries -- just be safe about it (PPE, grounding at chassis, etc.).

Won't you lose settings even if you disconnect for 3 or 5 seconds

Right, but what I'm suggesting is that you apply power to the car via jumper cables from another car -- clamp the positive onto the positive battery terminal (that part that attaches to the battery), and the negative to a grounded chassis point. That way when you pull the terminals off the existing battery, the car is still getting power via the jumper cables. As long as you leave those attached until you hook up the new battery, the car will never be without 12 volts. Make sense?

[bcgreen]

Got it.
So I've got two avenues, jumper cable route or trickle charger via cig. socket.
And then someone commented "I had my battery disconnected for a while for a steering wheel swap (requires disconnecting the airbag). I don't remember having to reset anything other than the clock.

[Tom]

Got it.
So I've got two avenues, jumper cable route or trickle charger via cig. socket.
And then someone commented "I had my battery disconnected for a while for a steering wheel swap (requires disconnecting the airbag). I don't remember having to reset anything other than the clock.

The cigarette lighter approach might not work. There are two potential problems. One, on some Porsche's, the cigarette lighter shuts off either with the key or after a specific amount of time. Many people have problems charging their Porsche through the cigarette lighter for this reason. Two, even if the lighter socket remains active, the charger may stop delivering power when the battery is disconnected, since it is designed to detect whether a battery is connected and only deliver current if it is (in other words, when you disconnect the battery, the charger essentially turns itself off and stops charging).

[bcgreen]

Well now, that takes care of one of the choices.

[geoff]

If you have one of the CTEK chargers with a supply function, plug it into the cigarette lighter on your dash, and when you disconnect your old battery and put the new one in, all your stored setting won't get lost. You need to set your CTEK to supply. If yours doesn't have that function, you're SOL