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A mobile charger, also known as a power adapter, is an electronic device that converts alternating current (AC) from a wall outlet into low-voltage direct current (DC) to recharge the battery of a mobile phone or other portable electronic devices. It typically consists of an adapter or "power brick" that plugs into the wall and a connecting cable. The adapter contains a transformer and other circuitry to safely step down and regulate the voltage and current to levels that are suitable for the device being charged. Key specifications include the input voltage