On page 7 of the owner's manual, it discusses periodic high voltage battery re-conditioning to ensure the battery is operating at maximum efficiency. It only states " you may notice slight changes in drivability during this process".
After driving my 2010 for about 16 months, I experienced what I suspect was such a re-conditioning event. There was no dash light or warning message on the dash. The engine would continuously run and the battery gage went to full charge, EV mode was disabled, so even with full charge and stopped, the engine would run. This lasted for about 10 miles, before the battery slowly returned to mid-charge level.
I only found one post on this topic at another forum web site.
Anyone know more about what conditions prompt such a re-conditioning event?