iOS 15.7.8 iPhone Battery Life / Battery Drain / Speed Test.

Hello everyone, and welcome to the iOS 15.7.8 battery performance video.

iOS 15.7.8 was released June 24th 2023

This video was shot 36 hours after iOS 15.7.7 was installed, so it had some 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 just 36 hours after I updated them this time. In that period they were left without power, and also powered back to 100% to be
ready for the test to run.

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.

Music by Niwel (see credits below)

SOUNDCLOUD: @niwel-516897768

[vasudevmenon]

Thanks. Didn't notice much drop in battery life from 15.7.7 on iPhone 7

[Roman-zf]

Fast battery drain on iphone 7 after 15.7.7 I do not recommend updating👎

[Blackindigo]

This is my go to guide to check whether I should update. Keep up the good work.

[boabdil]

Muchas gracias por su labor, siempre le consulto antes de actualizar 👍👍

[jhonataviniciusalmeidalope]

Cai you do some video about the IOS17 beta? i would like see your videos about that as well, I like your videos and I like seeing you comparing the new IOS with the old version (Currently), Thx :)

[dexterhodge]

Speed scores for 7 here are up ~10% for single core and far higher percentage increase in speed score for multi core here compared to just previous test 15.7.7
Any real world feedback from 7plus users on battery life of previous version or this and any noticeable differences in performance?
Thanks!

[mairamahome]

So I should installed on my 6s or not???

[deepmission]

hello 15.7.8 will be better in speed than 15.7.7? for iphone 6s

[timepaas]

Still rocking se with a power bank lol 😂

[edoct]

Wouldn't it be better to wait a couple of days before doing these tests?

[ermanpreetsinghdhaliwal]

Iphone SE have more multiscore than iphone 7 😂