4. Listen and repeat. Find these words in the text. Can you guess their meaning?

This task requires listening to an audio and identifying words from the text, and defining them according to the context. This task cannot be accomplished without the audio. However, I will list the vocabulary words and their common definitions: * **app:** A software application, especially for a mobile device. * **battery:** A device containing one or more electrochemical cells, used to convert chemical energy into electrical energy and used as a source of power. * **portable charger:** A device that can be used to charge electronic devices when a power outlet is not available. * **ringtone:** The sound made by a phone when someone is calling. * **touch screen:** A display device that allows the user to interact with the device by touching the screen. * **Wi-Fi:** A technology for wireless local area networking with devices based on the IEEE 802.11 standards.