I went away for a week, left the car in a garage unplugged to test it as well.
Fri Aug 23rd 8pm - 359km
Wed Aug 28 8am - 351km (Saw an update and thought it would be great to test it out)
- 348km (after update installed)
Sun Sep 1st 8am - 340km
A consistent 2km/day for me. No sentry mode.