Am i correct?
Yes. And that charging voltage and it's little peak shift have nothing to do with the actual terminal voltage of the battery after you disconnect it. It's a small dynamic voltage change during the charging process to signal that it's time to terminate the charge process. Other means of stopping a constant current charge cycle is to have the temperature sensor inside the battery pack as the temp will start a rapid rise upon full charge being reached and that is how a lot of the early 'rapid' chargers worked. But of course that worked with only higher priced battery packs that had the proprietary temp sensor (compatible with the charger) in them.
Lefty