In the video, a person is holding a smartphone in their left hand and using their right hand to remove the battery from the back of the phone. The phone is black in color and has a camera and flash on the back. The person removes the battery by pressing down on a small latch and pulling the battery out. The battery is rectangular and has a label on it that reads "Lithium Battery Type 3000mAh". The person then replaces the battery by pressing it into the slot and pressing down on the latch to secure it in place.