Yep, this is it.
They are trading battery longevity for faster charging.
Personally, I generally prefer battery longevity, since that is the main factor that causes me to buy a new phone.
This is also the main reason I would like to buy a Fairphone for my next phone. I can get a new battery for $50 and replace it myself. And with 8-10 years of updates, I figure I can actually use it for 8 years with two battery replacements along the way.
As your links explain, C series is used for envelopes, while B and elongated A are special case that aren’t commonly used.
In any case, none of those series has an equivalent to American Letter.
The only paper that you will commonly find in European offices are A4 and (to a lesser extent) A3.
A big office printer might have 4 trays stocked with A4 and one tray with A3, for example.
As a European, I do appreciate Legal as a format.
It just happens slightly too often that an A4 is not long enough and the last bit, including the signature, goes to the next page.
I wish Legal was common here. Or perhaps we could get a Long A4 with a third extra height or so.
The Letter format should just be replaced by A4 though.
Looks like they at least made it sturdy enough to withstand a car wash.
Progress!
Ahh, I didn’t know it was already June next year.
Hopefully my current phone will last another year.