Laptops, notebooks or netbooks generally use less power than desktop computers, because they are designed to run on a battery and to be more power efficient. Furthermore laptops rarely have a powerful video card and often use integrated graphics instead, which requires less electricity. The power consumption of a laptop depends on the screen size, typically you will find power consumption as low as 20 watts and up to 100 watts when running off the battery. When charging the laptop battery power consumption will increase 10 to 20 percent, we estimate that 60 watts is average power consumption for a 14-15 inch laptop when plugged in.
See below the energy consumption of a 14-15 inch laptop that is using 60 Watts when plugged in for 6 hours a day @ £0.19 per kWh.
Cost Per Hour: £0.0114
Cost Per Day: £0.0684
Cost Per Month: £2.08
Cost Per Year: £24.97
kWh Per Day: 0.36
Tip: Laptops, notebooks and netbooks are a great choice for computers if you are interested in lower power consumption, plus they have a benefit of mobility. Similar to desktop computers enabling power saving features such as sleep or standby modes will reduce the energy use of your portable computer.
If using your laptop on a TV, use the settings to disable the laptop screen.