> Depends on how "cycle" is defined - I'm sure they can finagle it so "any charge added to the battery" counts as a cycle.

The definition is pretty well established, and Apple themselves have for years used it consistently.

https://www.apple.com/batteries/why-lithium-ion/

> You complete one charge cycle when you’ve used (discharged) an amount that represents 100% of your battery’s capacity* — but not necessarily all from one charge. For instance, you might use 75% of your battery’s capacity one day, then recharge it fully overnight. If you use 25% the next day, you will have discharged a total of 100%, and the two days will add up to one charge cycle. It could take several days to complete a cycle.

>Depends on how "cycle" is defined - I'm sure they can finagle it so "any charge added to the battery" counts as a cycle.

the definition of a battery cycle is very well established. there isnt really any room to finagle it.

Charging to 80% significantly decreases the wear. Your battery would be way lower if you charged to 100%

I don’t think “a cycle” is up for redefining. I hope these terms are defined in the law.

But that supports my assumption that realistically the batteries don’t last 1000 cycles even when charged conservatively. The last 9% will go faster than the first 11%, the battery already has lower capacity and needs to be charged even more often.

On the other hand if I only get to 1000 cycles by charging up to 80% then I’m not getting 100% of the battery, am I?

Dieselgate was caught by some dudes with an emissions measuring device. It’s not that extreme to get a number of iPhone batteries, test them to 1000 cycles and see if statistically they still retain 80% capacity. If they don’t Apple could be looking at replacing everyone’s batteries.