why my i7 the battery meter become yellow color? In normal it is green color

Hello,

You might have enabled the Low Power Mode to solve this issue you will have to (Turn OFF Low Power Mode) to do that Go to Settings>>Battery>>>Low Power Mode (turn it off).

Regards,

Shashwat Singh Syan

Most likely, you have enabled Settings>Battery>Low Power Mode.

Regards

Giulio

My pleasure