It does really well. The default OS which TRIMUI ships it with performs really well on the sleep front, but the community OS I’ve installed (NextUI) is known for how well they implement their ‘deep sleep’.

The overnight power draw I’ve seen has been 1% of the battery. NextUI’s use of it has by far been the best I’ve seen for a device’s sleeping. I saw someone say it lasts around 2 months in their deep sleep.