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1. Dim or reduce brightness of the screen

One of the fastest power draining source on most laptops is the screen, Or to be more specific, the screen’s backlight. This is also known as the visuals, and some older laptops have power-sapping fluorescent backlights. Modern laptops have LED backlights, but even these use a moderate amount of power.

Dimming your brightness can add 40 minutes or more to your battery life. Usually laptops have keyboard shortcuts to adjust the brightness. Typically, you’ll hold the Fn key and press one of the function keys in the top row, or one of the cursor keys labelled with a sun kind of symbol.

If not, hold the Windows key and press X. This will open up the Mobility Center where you can change the brightness, and this works in all versions of Windows.

2. Change your power settings

By default, your laptop might be set to Windows ‘Balanced’ setting rather than Power Saver. In the Control Panel search for Power Options check which Power Plan is selected. Windows actually makes use of different power and performance settings depending on whether it is running on mains or battery power.

You should find a battery saver option, and it’s simply a case of selecting it and closing the window. If not, click on ‘Show additional plans‘. If there’s still nothing, you can customize a power plan by clicking Change plan settings next to a profile and adjust to your taste and then save.

You should set the screen to turn off after a couple of minutes, and set the laptop to sleep if nothing appears to be happening after few (5, 8, 10, 15 etc.) minutes.

If you delve into the advanced power settings, you can do more things to suit your needs, setting when the system should hibernates and which components should use their maximum power saving profiles (including, on some laptops, the graphics card and Wi-Fi adapter).

In Windows 10, there’s actually a toggle button to enable battery saver mode. This works just like your android phone’s and limits background activity (e.g. push email, updating of 3rd party Apps etc.).

You can click the battery icon to find it, or click the icon in the bottom right corner of the screen to bring up Action Centre: you would see the Battery Saver box near the bottom. It will be greyed out if your laptop charger is connected. To find out which apps are draining the most power, click the battery icon near the clock, then click Power & sleep settings. From the left-hand pane click Battery and then on the Battery usage by app link. You can also make this mode turn on automatically by ticking the box and adjusting the slider to your taste.

3. Turnoff or Switchoff Wi-Fi and Bluetooth

If you’re not using them, turnoff Wi-Fi and Bluetooth. Both wireless connections can use a fair amount of power, so it makes sense to turn them off when you’re on battery power. Most laptops have a switch or key combination to switch off Wi-Fi, but Bluetooth can be trickier.

Some manufacturers provide a utility (often obvious in the Start menu) to enable or disable Bluetooth, but if none, you can head to the Device Manager in the Control Panel, scroll through the list of hardware until you find the Bluetooth adaptor, right-click on it and choose Disable. (Double-clicking on it when disabled should enable it again.)

Resources:

TechAdvisor (https://www.techadvisor.co.uk/feature/laptop/how-improve-laptop-battery-life-3462609/)

WikiHow (https://www.wikihow.com/images/thumb/a/a1/Extend-Laptop-Battery-Life-Step-22.jpg/aid326781-v4-1200px-Extend-Laptop-Battery-Life-Step-22.jpg)