Tuesday, February 6, 2018

Battery Health and Peak Performance Capacity

Benjamin Mayo:

As promised, Apple has included a new screen in the iOS 11.3 beta 2 settings called Battery Health (Beta) available on all iPhones since iPhone 6. This view includes information about the maximum capacity of the battery in the device, and describes whether the battery has degraded to the point where it can no longer offer peak performance.


With iOS 11.3, it is now possible to disable performance management, stop the throttling, and restore full speed. Apple has also tweaked the algorithms that decide when performance management should come into effect. Apple says performance management is more ‘adaptive’ than it was before so that it can dynamically increase or decrease the amount it is used, without the user doing anything at all.

iPhone 8 and iPhone X include smarter hardware that enables Apple to more precisely apply power management, so noticeable effects of throttling on these devices should be less when it eventually kick ins.

Apple has actually posted lots of beta screenshots itself.

Previously: Tim Cook Talks iPhone Batteries, Apple’s Message to Customers About iPhone Batteries and Performance.

Update (2018-02-06): See also: Juli Clover.

Update (2018-06-23): Dr. Drang:

So, is the maximum capacity reading inaccurate? Is Apple giving bad advice to its customers? Am I drawing a conclusion too soon? Whatever the answers, I'm pretty happy with my $30 investment.

Update (2018-06-24): Dr. Drang:

I got the battery in my iPhone replaced last Sunday, and after a week of use I can say without reservation that it was a big success. Before the replacement, a normal day of use at the office would put the battery well below 50% and I’d usually have to recharge sometime during the evening; now it’s typically over 80% when I get home, and I don’t even think about recharging. This success is tempered, though, by the poor advice Apple gave me before doing the replacement.

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From Juli's first article:

"Apple has implemented performance management features in the iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, and iPhone 7 Plus"

If this 'feature' will be present on all of these iPhone models... doesn't this mean Apple is now admitting that the battery designs of all these models are inadequate for running the devices as advertised?

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