Is bypass charging really in use on my Pixel?

whiskeywalrus

I have the charging optimization "Limit to 80%" turned ON on my device, and while my phone was at 80% charge with the "shield charging icon" visible, connected to PPS supporting charger, I noticed that the battery dipped to 79% on heavy use. I have only noticed this happen once, but it got me wondering if the bypass charging is really used, as my understanding is that the battery is completely bypassed even on heavy use of the device. Is there any way to check this?

Phone is Pixel 8 Pro, running latest version of GOS.

GrapheneOS

whiskeywalrus Yes, it has bypass charging.

whiskeywalrus

Anyone?

Skyway

whiskeywalrus I suppose you could use a USB power meter and see if the current changes with use and maxes out.

TalentedQuill

You can directly monitor the power draw. When my pixel 9 pro xl gets to 80% it will start drawing erratic amounts of power from my power supply, fluctuating from 0.1A to over 1.4A depending on what I am doing on my screen. That indicates that it is indeed drawing power directly from my power supply and not the battery once it hits 80%.

pwmsensitive

DeletedUser130 clarify if Pixel devices also require a PPS compatible power supply for the battery bypass feature to work.

Yes, PPS is needed:

TalentedQuill

pwmsensitive

The current release includes the bypass feature:

GrapheneOS Yes, it has bypass charging.