Apple has as promised with Consumer Reports and cooperates now published first results.
The problem of widely varying battery life was apparently sometimes at the methods used by Consumer Reports in its tests.
Apple and Consumer Reports have been working together to determine the issues that Consumer Reports had with the new MacBook Pro’s battery life during its review, and on Tuesday, both issued statements on their findings. It turns out that Consumer Reports uses a developer setting that typical users don’t use, and also that the same setting has a bug that affects performance.
In its review of the MacBook Pro, Consumer Reports said its battery life test results varied wildly, from 4 hours to 19 hours. Consumer Reports explained on its website that its laptop battery tests do not necessarily reflect real-world usage; instead, tests are designed to be consistent across different laptops for comparison’s sake. In the case of the MacBook Pro, Consumer Reports’ battery tests uses Safari in Developer mode, which is not the default setting.
Now it has found the first problems with the test methods, which were said to be responsible for the widely varying maturities. iMore received from Apple an appropriate statement and Consumer Reports has now ruled on.
So the testers used the hidden to normal users developing options to disable the browser cache.
This, in turn, led to the fact that an error in Safari occurred that triggered repeated charging of icons from the grid.
Corrected by Apple now in the beta version of MacOS.
Better control by clearing the browser’s cache
Caching content ensures that a browser does not have to establish a connection to a remote server for each access. Therefore, graphics and other contents are cached locally, Consumer Reports describes in his report that by disabling has better control over how a device reacts.
These measures are to lead to an improved comparability between different devices; even if a normal user would not disable the browser cache. For the same reason, the sites are using a local server load in the laboratory at Consumer Reports. The automatic brightness of the display is turned off and set to a default value (100 nits).
However, it is still surprising how Consumer Reports could achieve battery life from 3.75 to 19.5 hours. In particular, the last value is highly questionable if the problems merely because of a disabled cache, which would reduce the maturities occur. In our test the MacBook Pro 2016 (13 inch without touch bar), we came to a good 7 hours of runtime.
Tests with browser caching show consistent results
Consumer Reports reactivated after the talks with Apple browser caching in new tests and was able to determine that all three tested MacBooks (13 “MacBook Pro without touch, as well as 13” and 15 “MacBook Pro with touch bar), continuously long battery runtimes reached.