I've been diligently investigating how to minimize battery usage on a Google Pixel 7 Pro, Pixel 6a, and Pixel 5a. To that end, I installed GrapheneOS, enabled Battery Saver (permanently) along with a significant number of other battery optimizations.
Naked Owner Profile Battery Consumption
The Google Pixel 6a and a Google Pixel 5a have two profiles: a "naked" Owner (Admin) profile, which contains absolutely no running apps other than what's needed to run the phone, and a User profile loaded with my standard GrapheneOS setup, Google Play Store installed (not logged in), and 107 apps enabled and configured to my preferences. Both phones were charged to 100%, restarted, and at approximately the same time, I logged into the Owner profile and pressed the power button to lock the phone. After 25 hours, here's the battery consumption:
- Pixel 5a: 3% consumed, 97% battery remaining
- Pixel 6a: 6% consumed, 94% battery remaining
No Profiles but Same Battery-Saving Techniques
The Google Pixel 7 Pro is my personal phone using the same battery-saving techniques above, but is an operational phone. After 28 hours of light usage, there is 74% battery remaining. The phone itself estimates that it will continue running for another 3 days.
I did not set up profiles because of the experiments I'm doing with the 6a and 5a. If they are successful, I will factory reset the 7 Pro and set it up like the 5a and 6a using a "naked" Owner (Admin) profile and at least one, maybe two, User profiles.