Happy Holidays all! I’ve been using the below Porsche battery maintainer for several years with my Boxster and then now I’m using it with my 911. I liked it so much, I bought a second (used from eBay) to help my mom keep her Benz’s battery topped up (as she only drives maybe once a week). This should work for any car as long the lighter socket is live when the car is off, right)? And yeah, I know the newer CTEK ones are better cause they have more functions, but I like this one for my mom as she’s older and this one is just plug in (with no switch options), so easier to use. Thanks!