9 reasons why your phone battery drains quickly
Battery is an extremely important factor in smartphone user experience.
Chrome is the reason why your iPhone battery drains so quickly
Our phones can do so much these days and have so much hardware built in that it’s best to get you through a full day of use. Some people have shared a tip to improve battery life by uninstalling a single app: Chrome. Your battery life will be better after that!
Chrome is the "destroyer" of iPhone batteries
You’ve probably been told to switch to Safari because Chrome drains your battery. But you may have been hesitant if you like your browsing data synced across devices. But the potential for improved battery life is too much to ignore.
After a week of using Safari, you'll see a noticeable difference. You'll be amazed at how long your battery lasts throughout the day.
Google owns Android and Chrome, Apple owns iOS and Safari. There's a natural expectation that native apps, written by the same company that makes the operating system, will be tightly integrated and therefore more efficient. This is also why Galaxy phones work better with Samsung's Internet browser than Chrome.
Battery test
There needs to be a fair way to judge battery usage across both browsers, but it’s not easy. You could consider using Chrome for a full day and then Safari for another day, then comparing usage in Apple’s battery settings, but there are too many variables to control for.
The sites you visit one day may not be the same every day, or you may browse more on a different day. Using each browser for the same tasks is another idea, but not practical.
Finally, it’s best to run the test over an hour of continuous web browsing. More specifically, set up a bookmarklet script that continuously scrolls through a web page. You can see the code for it on Pastebin if you’re curious about the technicalities. It sounds simple, but it’s ideal for consistent, repeatable testing.
How much energy does Safari actually use?
Start with Safari. Close all running apps (iOS still lacks Android's ability to quickly close all apps), turn off background app refresh, and restart your phone to give Safari a clean slate. Turn up your screen brightness to maximum, turn off auto-lock so your phone doesn't turn off, and go to a website's home page. Enable the bookmarklet to keep the page scrolling.
After an hour of continuous scrolling in Safari, close the tab. The battery in the example was at 90% when it started. How much battery do you think Safari used while on maximum brightness scrolling through the home page for an hour? Take a guess!
By the end of the hour, the battery was down to 87%. Safari only used 3% of the battery in an hour under those conditions - which is surprisingly efficient. Keeping the phone unlocked for an hour would have used much more power, even without browsing the web.
To be fair, the site’s home page doesn’t constantly bombard the phone with new content. It’s a fairly static, well-optimized page with a few images and a scrolling carousel at the top. For heavier or more graphic-heavy sites, Safari may be more power hungry. But keep these factors in mind and keep testing.
What about Chrome?
Then it was Chrome’s turn. The test started at 88%, repeating the exact same process. Closing all apps, restarting the phone, opening the website, and triggering my continuous scrolling script.
An hour later, the battery was down to 83%, meaning Chrome had consumed 5% of the battery during that hour.
What does that little difference really mean?
The difference isn't huge. Chrome uses 5% while Safari uses 3%, a difference of only 2% in this test case. Both results are pretty good considering the screen is set to maximum brightness and actively scrolling the entire time.
Some people might ignore a mere 2% difference per hour. However, if you break the numbers down proportionally, Chrome uses about 60% more than Safari. That difference can become a big issue when you scale up to heavier usage over longer periods of time. If Safari uses 30% in a hypothetical scenario, Chrome uses 50%.
Of course, battery drain doesn't always add up. An hour of light scrolling may not translate directly into your daily mix of streaming, messaging, and gaming.
However, this test provides some concrete numbers that show Chrome is less efficient on the iPhone. Since Safari already handles your needs and importing history from Chrome is easy, there's not much reason to keep Chrome installed.
This isn’t meant to be a knock on Chrome; it’s still the browser of choice for many people on their computers. But on the iPhone, battery life is everything. Even a few extra percentage points can save you from having to quickly plug in your charger in the middle of the day. If you can extend your phone’s battery life by switching browsers, that’s a trade-off you should be happy to make.
Safari doesn't lack any features you'd really need on iOS, and the performance boost has made the phone more reliable throughout the day.
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