Watts.
Power supply units are rated based on their output and efficiency. When more equipment is connected, a higher output power supply is needed.
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Output - because it is outputting power to the rest of the device
Obtain a power supply that has the correct output voltage that you need.
Yes.
because it is devices
You can purchase a 500W Modular Power Supply online from stores such as Directron. Alternatively, you can purchase a 500W Modular Power Supply from retailers such as Amazon and Newegg.
for sure
You will have to purchase a power supply with a 12 volt DC output capable of handling the current draw of the car radio. Try "google" to find the manufacturer's specification sheet for the radio. In the specs. will be the amp draw of the radio. With this information you will know what amperage the output of the power supply needs to be.
One can purchase a Compaq power supply replacement at various retailers. One can purchase a Compaq power supply replacement online at Amazon and the HP Official Store.
The input voltage range for the Toshiba power supply is AC 100V - 240V. The output voltage is DC 19V / output current is 4.74A. This power supply comes with a power cord and packaging will state voltage recommended for the product.
The "power supply" supplies power to a computer. A computer's power supply is a "switchmode power supply" responsible for converting the AC voltage from the wall into several DC output voltages.