It doesn't mean that at all. Nobody tests
phones for
battery failures like this, certainly not on the scale that would've been necessary to find these relatively rare occurences ahead of time.
If you mean announcing a voluntary recall before the CPSC did, that's actually not unusual. Heck, Apple themselves have done the same thing before, but nobody made a big fuss over them doing it.
That is definitely a lot of phones under test! Kudos for them building such a facility to figure things out.
I once helped design and build a rack to test 100 synchronized computers at a time, and we thought that was a lot
For comparison, remember this leaked photo of a haphazard iPhone 5C test rack at the factory, with just a few dozen production units under test at a time?
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