Captscrub

Installed a new battery in my 2018 GT3. Kept my settings alive by plugging in a power source in the cigarette lighter. Is there anything else I need to do? I saw a You Tube video saying I have to 'register the battery.to the car' The battery I installed was comparable to the OE in amp hrs, CCA, and a glass mat.
It seems like a simple thing like this shouldn't require a scan tool to install.

FourT6and2

There is a lithium battery setting in PIWIS and/or in the vehicle settings. But from what I understand, the vast majority of people do not bother.

pjazz

They say that if you don't program the ECM for a new battery the system won't charge the battery proportionally for it's actual age. Porsche won't program an aftermarket battery, but I've done it with my Antigravity by instead of using the part number of the aftermarket battery and using the old battery part number. I used my icarsoft programmer for this. I see quite a few people who don't bother and I can't say if it decreases the life of the battery or not.

Norsk

My original battery failed about a month after I got the car, dealer sent out a tech with a new battery to my house to replace it. He just swapped it out, no power source during the switch, no programming. Still good three years later…

TinyPP

Keep in mind when you change your Battery your evap system will reset. If you're going to get smog/registration done, you'll need to drive the car a 100 miles or so. Alternatively, you can buy a cigarette lighter to cigarette lighter car-to-car jumpers to keep ALL memory including radio stations, evap etc.

Here's one example. There are many. You can use this on all your cars when the time comes.

https://a.co/d/a90JVD7
or
https://a.co/d/cGrOow9

driIve

Probably dumb question but is this the same as plugging in battery tender via cigarette lighter? Or does it have to be plugged into another car?

TinyPP

That's a really good question, but I'm not sure. I generally don't like trickle charging through the cigarette lighter, just a personal preference.