New G2 HP Prime

[akmon]

I would like to ask you if you have detected different battery status icon changes in a shot period of time.
I explain: after turning the unit on the icon showed yellow bar. Strange, I thought, that it consumed so much power. But later it turned to green 75%.
After some minutes using the calc the status turned into 50%, but after a few minutes of "rest" of activities, when I pushed the icon it went to 75% again.
Have you noticed somthing similar?