The mobile hotspot is configured (by default) to optimize battery life. There are several methods you can use to extend the battery life: Note: For GoPhone Users: Your device will have a different home screen showing ‘To check your data balance, go to att.com/mygophone’
If the devices you are connecting to your Wi-Fi network are always near the mobile hotspot device, shorten the Wi-Fi range. Home screen > Wi-Fi > Wi-Fi Range
Reduce the LCD's brightness level. Home screen > Settings > Display > Screen Brightness
Reduce the amount of time to wait when no devices are connected to either Wi-Fi network before going into sleep mode (Wi-Fi radio powers off). Home screen > Wi-Fi > Wi-Fi Sleep Mode
Set the Display Timeout to a shorter period. Home screen > Settings > Display > Display Timeout.
The more devices connected to the Wi-Fi network the more battery power is consumed.