Learn how to install battery on your Samsung Galaxy S4.
Insert the battery into the opening on the back of the phone, making sure the connectors align (1).
Gently press down to secure the battery (2).
How to install the Back Cover on Samsung Galaxy S4
Place the battery cover onto the back of the phone (1) and press down (2).
Press along the edge of the back cover (3) until you have a secure seal.
Note: Make sure the battery is properly installed before switching on the phone.