not all mftrs are as good - video on vw battery health, guy approaching the 100K miles warranty on 21my id4,They do them for my Gen 2 Leaf as well. A 62kWh battery would boost my range to 271 miles but cost over £7k plus shipping and import duty, that's a lot of money and then I would need to find someone up here to do the change. My car is 4 years old now and as part of this years service they did a full health check on the battery and found it still to be 100% so it still performs as it did when new. It may be worth thinking about further down the line though.
cell module manufacturing/management problems, so 3 modules replaced individually over that period in warranty, just 10% dc charging;
djmk4 style, his additional OBD data gives heads-up on problem helped by American recall notices.
cell problems aren't isolated across mftrs, and 3rd party health certificates for second hand purchase useful.

