The typical desktop uses between 60 and 250 watts of energy per hour. Laptops must use less than this because they often have to rely on a battery pack. The average power consumption of a laptop depends on your model and the power settings you choose.
The average laptop uses between 15 and 45 watts of energy per hour, according to energy expert Michael Bluejay. For any computer, however, standby mode uses 1 to 6 watts of energy.
How much energy your laptop uses depends in large part on its processor. Faster processors require more power than slower ones, according to Bluejay. Also, how bright you keep your screen changes energy consumption.
CNet recommends setting the power option in Windows to turn off the display after 5 minutes while on the battery and 15 minutes when plugged into a socket. The computer should sleep after 10 minutes of activity and set the screen to 50 per cent brightness when not plugged in.
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