I don't think battery registration and coding necessarily correlates with Start/Stop on all vehicles. My 2016 BMW with Start/Stop needs it, while the late model Merc SUV does NOT, although it also has the Start/Stop feature.
A lot of confusion on this issue. Two parts: 1. Registration only needed for a new battery that has same spec as installed. 2. Coding, needed as well as registration, if you are installing a new battery with different spec to the battery currently installed.
I have noticed on the YouTube videos the coding capability seems limited on the phone app type bluetooth/phone devices. They mention coding with the Ah closest but lower than spec. if a direct match is not shown on the device or available. So, for instance, a 95 Ah newly installed battery would be coded as a 90 Ah battery (closest). My installed battery is 92 Ah, but same size replacement options all seem to be 95 Ah, 3 Ah higher. Thinking it best not to be concerned and just register battery as a direct replacement, and not worry about the higher Ah and recoding.
Appreciate input from others with more knowledge/expertise on this issue. Will I be compromising the new battery by NOT coding?