Reading e-books on the phone consumes a lot of battery power, so some measures can be taken to save battery. Here are some suggestions that might be useful: Turn off the screen brightness: Turning off the screen brightness can reduce power consumption because the higher the brightness of the screen, the more power is needed to keep it lit. Turn off notifications: Turning off notifications can reduce unnecessary power consumption, especially for applications that are displayed on the screen such as social media applications and mail clients. 3. Turn down the volume: Turning down the phone volume can reduce power consumption because reducing the volume can reduce the amount of sound data that needs to be transmitted. 4. Reduce the use of network connection: When using Wi-Fi connection, the phone will consume more power. Therefore, it is recommended to use Bluetooth or data cable connection to save power. Turn off applications when reading: Turn off other applications such as social media applications and email clients when reading e-books to reduce power consumption. 6. Regular charging: Regular charging can ensure that the battery is fully charged to prevent the battery from running out and causing the phone to be unusable. By taking these measures, the battery life of the mobile phone could be extended by saving the power consumption of reading e-books.