The default battery monitoring app that comes with GrapheneOS fails to report accurate battery measurements. In a fourteen hour period, with the screen off, it will say 30% of battery is lost to mobile network. After turning off the mobile network, 24% of battery is used. Of this percentage, 99% is due to mobile network usage. This plain does not make sense, or indicates a malicious GrapheneOS was downloaded through the secure HTTPS proxy of GrapheneOS's official website.
If I then turn off the wifi, in a 14 hour period, 20% of the battery is used. Battery manager attributes this to "99% - display". But this plain does not make sense, especially because 'tap to wake' is turned off in settings.
Device being performed on, is a Google Pixel 7a, ordered directly from Store.google.com.