When the battery-life indicator on your laptop drops into the single digits, the scramble to find a place to plug in can nerve-wracking.
You can find lots of tips online for extending laptop battery life, but according to engineers many of them are myths. As a prime example, some posts in online forums say you should never charge a laptop battery to more than 80 percent or let it drop below 20 percent. Other people insist that you should always charge a new laptop to 100 percent before using it.
Not so, the experts say.
“As with any technology, when it was originally emerging there probably were some things which might have been useful” but no longer are, says Mike Nash, chief technologist for personal systems at Hewlett-Packard. Today, esoteric-sounding advice tends to be outdated or just wrong. (“Personally, what I like to do is make a combination of garlic, olive oil, and baking soda, and put it on top of the device,” he jokes.)
The following tips for extending laptop battery life are quick, simple, and easy to follow. We also have some advice on how to shop for a laptop that will run all day.
Dim the Display
Your first order of business to save laptop battery life: Turn down the brightness of your display.
“Display panel brightness is absolutely the most battery-consuming technology we have,” says Gary Lusk, systems senior principal engineer at Dell. This is easy to do, and you don’t even need to go into settings.
Depending on your specific laptop model, you’ll probably find this functionality on one of the function row keys (F1, F2, etc.).
“When you first turn your computer screen brightness down to, say, 50 percent, for a moment you might say, ‘Oh, this isn’t bright enough,’ but about 10 seconds later your eyes adjust and it’s totally fine,” HP’s Nash says. “Especially if you’re just doing email or something on a plane and it’s dark, having your screen cranked down to 50 percent will have a dramatic impact on how long your battery lasts.”
Turn Off Unused Features
Once you’ve lowered the display, turn off any capabilities you aren’t using at the moment.
You can start with WiFi and Bluetooth: Why have your laptop’s radios continually search for signals while you’re fully engrossed in editing a Word document on a flight or at the library? In Windows 10 there’s a dedicated Airplane Mode (located on the bottom taskbar) to turn off both of these, and Mac users can turn them off individually using the controls at the top of the screen or by going into settings.
Some higher-end laptops, including those aimed at gamers, designers, and videographers, feature advanced graphics capabilities in the form of a dedicated graphics processing unit (GPU)—and these processors can burn through battery life.
But you don’t always need that much graphics horsepower. Laptops such as the 15-inch MacBook Pro with Touch Bar and Samsung Notebook 9 let you disable the dedicated GPU temporarily. Do that while you’re working on text documents or just browsing the web—the laptop will use the less power-hungry integrated graphics processor and make your battery run longer.
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