Q：After upgrading the system, the battery level only shows 5 bars, not the percentage. Also, when there's only one bar of battery left, the screen dims and the sound gets quieter, and I can't adjust the settings.
A：Dear user, we apologize for the inconvenience! To better meet user habits and needs, after extensive user research, our company has adjusted certain functions or effects of different products. The battery display on the U-series tablets is now displayed in 5 bars, corresponding to 30%, 50%, 70%, 90%, and 100% battery levels. When only one bar of battery remains, a low battery warning will be displayed to extend the tablet's battery life. The screen brightness will be reduced to one-third of full brightness, the volume will be lowered, and adjustments will be locked. We suggest you charge your tablet promptly. Thank you for your trust in Doug!
