As a technical blogger, I assume you are asking how to check the battery percentage of your device, which could be an iPhone, iPad, or any other smartphone. To check the battery percentage, you need to swipe down from the top-right corner of the screen, you will see the battery percentage, as well as the battery icon. In case you have hidden the battery percentage indicator, you can enable it by going to the Settings app, selecting Battery, and turning on the Battery Percentage toggle. In addition, most devices nowadays have a low battery mode that helps to save battery life by reducing power consumption when the battery is running low. You can also check the battery usage of the apps on your device to see which ones are consuming the most power. This information can be found in the Battery section of the Settings app.