The battery drains fast, How do I extend the battery life?

First of all, to charge a device or mobile phone, it is recommended to always use the main Samsung-approved charger attached with the box of the device.
 
Using the old charger of old device may provide less power from the charger to the new device. It may not charge or charging will take longer time.
 
Note that the different devices have different required charging current and thus it must correspond with the chargers output charging current.
 
Note that while charging, we advice to close all the applications on the device and turn off the mobile data or WI-FI.
 
If the battery drains fast while using, we recommend to use the device on the safe mode to check the problem of the device.
 
To activate the safe mode, you may need to shut down the device and restart it again. When the Samsung logo displays press and holds the volume down key until the lock screen display. When the lock screen displays Safe mode will be shown in the lower-left corner of the display.

By activating the safe mode we have just disabled the third party application and no data have been lost. You may need to keep an eye on the device for 2-3 hours and watch the battery consumption if the issue is solved or not.
 
If the problem still persists, Kindly visit the service center to check the device by our technician.
 
To deactivate the safe mode, you just need to restart the device.