Samsung SCH-S960RWBTFN - Manual (Page 19)

Battery
Before using your device for the first time, install the battery and
charge it fully.
Important! Before removing or replacing the battery, make sure the
device is switched off. To turn the device off, hold down
the
key until the power-off image displays, then
tap Power off.
Installing the Battery
1. Slide the battery into the compartment (1) so that the tabs on
the end align with the slots at the bottom of the phone, making
sure the connectors align.
2. Gently press down to secure the battery (2).
Getting Started 14