The car's algorithms for sensing, detecting, and charging are all programmed to the expected behavior of a standard battery. The lithium type has some different characteristics that doesn't behave like that, so the car sees weird behavior when it tries to deal with it and thinks something is wrong with it. That's always going to be a problem.
Thanks for the reply. It's not that much hassle to reset the battery, so I will just live with it. But I wonder now if I should have just kept with the lead acid 12V battery.
This is what I do when this happens. Only takes about ten minutes or so (please let me know if there is a better way or better order to do this):
1. Open all windows, trunk, frunk, all four car doors.
2. Be sure is in Park.
3. Turn off climate control so there is no temperature shown.
4. Powerdown vehicle in "Safety".
5. Seat unlatches from lower cushion in middle of each rear seat.
6. disconnect 12V battery neg cable,
6. Remove HV connector under back seat passenger side. Down on latch, lift up on gray.
7. reconnect 12-volt battery negative.
8. reconnect HV plug.
9. May still have a message about no power for about 30 seconds that
should disappear on its own.
So far, above has been working for me to get rid of the replace 12V battery message.
-Don- Reno, NV