iOS 14.3 Battery Life / Battery Drain / Battery Performance Test / Benchmark Tests ( 18C66 )

iOS 14.3 was released by Apple as a release candidate this time, not as a GM. Also we had 2 release candidates build 18C65 and then a few days later 18C66. This video was done on build 18C66 that I am betting on will be the same release as we will see release today December 14th.

It looks like in the future Apple will be naming the final release that goes out early to developers Release Candidate before it is pushed to the general public.

This video was shot 4 days after iOS 14.3 was installed, so it had time to settle in. I have seen many comments that it takes about a week for battery performance to optimize itself after an iOS update. I have always been skeptical of this statement as I have never personally had bad battery life right after I update.

If I restore and download backup from iCloud well then that is another story. So I decided to run the battery test 5 days after I updated them.

In those 5 days they were just idling with power connected. So let’s run the battery test again, and see if we will get some different results this time around. Before the test was run the devices were set to 25% display brightness, auto brightness has been disabled, all devices use same settings, and are connected to the same access point.

How Geekbench works : Geekbench 4 battery scores measure the battery life of a device when running processor-intensive applications.

It provides a consistent workload to the device, and generates a Geekbench score by evaluating the amount of work that it is able to do while the battery is discharging and the amount of time it takes for the battery to discharge.

The battery benchmark can be run in Full Discharge mode, from 100% to 0% battery level, to provide a high level of confidence in a device’s battery performance.

The battery benchmark can also be run in Partial Discharge mode, for 3 hours. If the battery benchmark is stopped after 10 minutes, by the user or by the battery reaching 0%, then the result will be saved and can be uploaded.

Battery benchmark scores gathered by any method except the Full Discharge mode provide a medium level of confidence in a device’s battery performance, and longer tests are more reliable.

When comparing scores, remember that higher scores are better, and double the score indicates double the performance.


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