How to Display the Kindle Tablet’s Battery Charge Percentage
Swipe down from the top of the screen to open Quick Settings.
You get approximately 11 hours of mixed use and 17 hours of reading from the battery on the 7-inch Fire tablet. On the 8.9-inch Fire tablet, you get 12 hours of mixed use and 18 hours when reading.
Tap the Show Battery Percentage in Status Bar button to On.
The percentage of remaining charge for the battery appears in the Status bar.
You can tap the Home button at the bottom of the screen to redisplay the Home screen.
To conserve battery life, there are several settings you can adjust. For example, you can use Quick Settings to disable notification alerts, lower screen brightness, and turn off wireless networking. While watching a video or listening to music or an audiobook, you can use headphones to avoid broadcasting through the tablet’s speakers. And, if you set up email, you can reduce the frequency with which the Email app checks for new mail.