The Browning Trail Camera Power Pack and The Solar Camera Power Pack are the only approved external power sources that should be used in conjunction with your trail cameras 12v DC input. When using either batteries should be installed in both the trail camera and the power pack.
It is not recommended to use a wall sourced power supply as they can potentially damage or cause inconsistent operation to your trail camera.
Using any unapproved power source can potentially void the warranty. For more information on these external power sources click the link provided below.