In this video, I open an old mobile phone and show its battery, speaker, and internal PCB circuit. You will learn what electronic components are inside a mobile phone and how they work. This video is useful for electronics learners, students, and mobile repair beginners. If you like the video, please Like, Share, and follow to the channel. | Thagim Elec Tronics

What is a transistor? ⭐ A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor materials, typically silicon, with at least three terminals for connection to an external circuit. | Smart Electrician

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