The CPU Is Not Your Laptop’s Biggest Battery Problem

An aging laptop (or any computer, for that matter) is the perfect equivalent of an elderly citizen. Despite best efforts, the age of essential components will certainly show itself at one point or another. For example, the processor will start to choke on tasks, and in some cases, your trusty processor may show clear signs of impending failure. However, one issue that many laptops struggle with, even if they aren’t that old, is battery life – and believe it or not, it’s not the hot CPU draining it faster than it should.

Although a processor can consume more power during intensive tasks and increase your battery drain, it is not the biggest power consumer in a laptop. Instead, the screen is the biggest draw, as lighting a 13-inch or larger panel takes a lot of juice. If you don’t trust Intel, or companies in general, an independent study from Jacksonville University also confirmed this fact and even revealed some clear numbers.

The study measured different brightness levels and how long each took to drain 5% of the battery. Guess how long it takes to burn down 5% of the screen brightness to 100%? On average, 815 seconds, or approximately 13 minutes. Reducing the brightness to 70% doesn’t make much difference in the real world, extending the time to around 20 minutes. The experiment consisted of watching YouTube videos, but if that doesn’t convince you not to push the brightness above 50%, nothing will.

You may be doing things every day that are actively damaging your laptop battery, like letting it constantly drain to 0%. Blocking airflow is another important thing. Placing the laptop on your lap may be comfortable and feel natural (after all, laps are in the name), but it blocks the air vents and causes the device to heat up enough to act as a heater. So make sure you have enough airflow for proper operation. Once you’ve done that, you can’t go wrong digging deeper into the settings.

Granted, you’ll get more mileage from keeping the screen brightness to a minimum, but removing unnecessary CPU processes will definitely help. Start with the old faithful Ctrl+Alt+Del, open Task Manager and switch to the Processes tab. Go to the Power Consumption column and you can see which apps are consuming too much power (it’s very likely that Google Chrome is using too much CPU if you have a few tabs open). Kill anything you don’t need by right-clicking on it and selecting End Task.

Of course, you can do this periodically when you notice that your computer is having difficulty. However, if you’re using an older machine, you may no longer be able to squeeze anything out of that old battery. So it might be time to replace the battery. It’s definitely worth the price as it’s a simple way to give your laptop a few more years – but not on your lap.