According to our investigation, the inaccurate battery health readings appear to be related to a CPU awake-loop issue affecting some Pixel devices. This behavior can interfere with system-reported battery statistics, which may cause applications that rely on Android APIs to receive inaccurate battery health information.
We recommend waiting for the upcoming June system update. Once the issue is addressed at the system level, we will further refine and update Pixel Prime's Battery Intelligence engine to ensure the most accurate readings possible.
Thank you for your patience and for helping us improve the experience.