The "20V" on an electrical appliance refers to the voltage rating of that particular device. Voltage is a measure of electrical potential difference, representing the force at which electric current flows through a circuit. The voltage rating indicates the amount of electrical potential or energy that the appliance is designed to handle or requires to operate properly.
In the case of "20V," it means that the electrical appliance operates using a 20-volt power supply. This voltage is specific to the appliance and should match the power source or battery pack it requires. It is crucial to ensure that the power supply provided to the appliance aligns with its voltage requirement to avoid damaging the device or compromising its functionality.
It's important to note that household electrical systems typically operate at higher voltages, such as 120V or 240V, depending on the country or region. However, some smaller electronic devices or battery-powered tools use lower voltages, such as 20V, 12V, or even lower.
Always refer to the manufacturer's instructions, labels, or specifications to determine the appropriate voltage for an electrical appliance and ensure that the power source or batteries used match the required voltage. Using incorrect voltage can lead to equipment damage, malfunction, or pose safety hazards.