The remaining power of the iPhone 5/5s battery is not displayed accurately.

Let the iPhone 5 display the remaining battery power in percentage:

1. Click "settings" on the iphone desktop.
         

2. Find and click "general" on the settings page.
         

3. In the general interface, you will see a "usage" option, which is the entry to set the battery usage. Select this option.
         

4. the usage interface contains a lot of iphone usage information, including the storage space size and remaining space. You can find the option "battery percentage, move the slider next to it to the right.
         

5. When the battery percentage function is enabled, a blue background is displayed on the slider. A percentage number is displayed on the left of the battery icon in the upper-right corner of the screen, which indicates the remaining battery value.