Note
High performance doesn't appear on the battery meter by default. To turn on High performance, open Power Options by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering Power Options in the search box, tapping or clicking Settings, and then tapping or clicking Power Options. Tap or click Show additional plans, and then choose High performance.