I paid close attention to the screen after rebooting and found out that the number popped up after a while, and then I saw an icon appear on top of the screen... it was AccuBattery Pro starting. Well, all I had to do was go to: AccuBatery Pro - Overlay Settings and deactivate Battery Current. To keep things clean I decided to deactivate all Overlays.
My memory is no longer what it used to be. 6O plus years and loosing memory is scary :-(