Tech Incline, Inc Inclinations

Power is generated through a standard power cord on desktops mostly, for other laptops and mobile devices it would be through specialized cords.
Desktops: Internal power supply with a cooling fan which vary in wattage. The amount of wattage determines the amount of parts that the power supply can sustain at one time.
Laptops: Power supply is run through an AC adapter which is usually the small box on the power cord. This adapter is specialized for your laptop to operate with the appropriate amount of power to control the components/parts already in your laptop.
Generally Encountered Problems with Power:

Not enough power.
Overheating power supply
Dying or weak power supply
Electrical surges – many different causes, among them being power shortages within the home, turning on or off the computer without shutting down properly. Best ways to prevent this are to at least have a surge protector (a multiple outlet power source that contains its own fuse which prevents the computer from absorbing too much electricity,) a battery back up power regulator ( This is basically an advanced surge protector with a backup battery supply. This controls the voltage going into your computer and if power is cut it will sustain power for a short period of time on battery. Laptops normally have this feature built in.) Note: It is almost impossible to protect electronics from a direct or even close proximity lightning strikes; short of completely unplugging the device from the power source before lightning strikes.