No doubt they will redefine maximum battery capacity to a figure that does achieve 80% over 1000 cycles. If you under-declare maximum capacity then there is a lot of headroom for actual degradation before you start to show degradation to the user.
replyiPhone 17 Pro launch specs:
reply> Video Playback: Up to 27* hours
> *: 25 hours in the EU
This is what they should have been doing all along. My Pixel tells me that charging above 80% is bad for battery longevity and I should set a charge limit. Well then maybe 80% should be the new 100% and the advertised capacity should be the 80%.
replyThis balancing act is already happening. If you modify the battery controller, you can totally continue charging beyond the voltage that the phone considers to be 100%. It also increases the risk of damaging the battery (https://www.acebattery.com/blogs/what-will-happen-when-a-lit...). What they define as 100% is already some point on a damage probability curve, and charging to anything below that point will further decrease the amount of battery stress (for li-ion batteries and similar technologies)
replyFwiw, based on tests I've seen recently such as https://www.youtube.com/watch?v=Lj4LMlGr4og, I think limiting to 80% is overblown, but somewhere in the 90%s could be a sweet spot that gives you several hours' longer battery life than with 80% but still has a much reduced chance of significant degradation. I don't understand why they didn't make this configurable
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replyA battery that can support 1000 cycles and remain above 80% capacity would be a literal brick. For an example the Vision Pro's battery has extreme over-provisioning and limit how long it would last. (note I know it is removable but that isn't the point).
replyWell, this just incentivized a new battery tech then, what's the problem?
replyI would wager that batteries that powered down at 20% and that halt charging at 80% would be significantly prolonged.
replyIf Apple resorts to those tactics, then there is no limit in moving the goalposts.
In the meantime, my daily driver here in reality land: https://i.imgur.com/8yEEJVb.png
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That has not been my experience, at least with Apple laptops. Even when rated for 1000 cycles, I'll get the warning that service is needed (AFAIK that means 80% capacity or lower) well before then. I've seen this on several, but the one I just checked is at just under 670 cycles and has had that warning up for some months already.
replyMaybe iPhones are better about this, though, I don't know. But I definitely don't have a lot of faith in the laptops maintaining 80% for 1000 cycles.
AppleCare covers the 80% capacity/1000 cycles rating, so I always keep an eye on my battery around 1000 cycles praying it will drop under 80% so I can get a new battery for free under AppleCare, and have yet to manage it
reply212 cycles, still 100% capacity (maybe 99.5 rounded up) "relative to when it was new". Doesn't that seem a bit dodgy to you?
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