“Actually the battery will probably lose the exact amount every year, and nothing will ever go wrong with any parts of it, and also they’ll also break the rest of the car at the same rate as a gas car, which is 20 years, which we’re going to call 15 years. Which means in 12 years the car will be useless, but the battery will still be at 80%. MATHS.”
MG started offering a lifetime warranty for the battery and drivetrains in Thailand.
It confirms what the article is saying, manufacturers know with their experience that the rest of the car will break before the battery or the motor does.
They include climates in the study but only hot climates and temperate climates. Temperate climates perform the best of course, but that’s expected given the narrower temperature ranges.
I would like to see studies for cold climates. Here in Canada we have freezing temperatures for about half the year and sweltering temperatures for a quarter. The shoulder seasons bring lots of rain and temperature fluctuations. This mix of always changing temperatures and humidity (along with all the salt used to de-ice roads) is absolute havoc for ICE cars. It tends to rust them out a decades before the engines give out.
On the other hand, freezing temperatures are brutal on batteries (I know this from how my phone responds to the cold). I do know that a freezing cold battery needs a ton of extra energy to heat up before it can even begin charging. Having an EV in Canada without an indoor parking space for it is not a great experience.