Our external power supplies provide you with flexible and reliable power for laptops, monitors, and other devices. Ideal when you're on the go or need to power multiple devices with one power supply.
External Power Supplies
External power supplies are used to power notebooks, mobile phones, tablets, and voltage converter boards. The key factors in selecting the right model are the connector used and the output voltage. Notebooks and voltage converter boards are usually powered with direct current between 12 and 25 volts, with models around 19 volts being particularly common. Many motherboards in the space-saving Mini-ITX format, such as those for AMD's Kabini APU series and the Intel NUC, also use external power supplies. Mobile devices like tablets and phones typically require a 5-volt power supply.
Selecting the appropriate external power supply
The output voltage of the external power supply must always be within the acceptable tolerance range for the input voltage of the device being powered. To avoid overloading the external power supply, its rated power must be sufficiently large. Any ampere ratings, unless otherwise specified, are always maximum values: connected devices may draw less current, but overload could damage both the power supply and the device.
Therefore, a 19-volt power supply with 95 watts of power and a maximum of 5 amps can also power a notebook that only draws up to 3 amps. However, it is not possible to use this power supply with a voltage converter board with a 12-volt input voltage. Similarly, a 19-volt notebook that draws up to 10 amps/190 watts should not be connected.
