Preserving battery life on smartphones.
The Wirecutter,a product recommendations website, tested a range of recent Apple and Android smartphones with the latest operating systems in tightly controlled environments. Your phone’s results will vary depending on the phone model, cellular carrier, location and other factors, but the general results should hold. Here are eight tips and seven myths busted by our findings:
1. Use auto-brightness for the screen.
A smartphone’s screen consumes more energy than any other component, so the easiest way to cut down battery drain is to reduce your screen brightness. In an hourlong test, an iPhone 6s used 54 percent less battery power with the screen brightness at minimum as compared with maximum brightness. An Android test phone used 30 percent less.
But it’s tough to use a dim screen in bright environments, so most phones offer an auto-brightness mode that automatically adjusts the screen’s brightness based on ambient light. The Wirecutter found that enabling auto-brightness saved a good amount of battery life.
2. Block power-sucking ads.
When browsing the web, your smartphone also burns through power when it downloads mobile ads on websites. Installing an ad blocker will greatly extend battery life.
The Wirecutter ran a test that cycled through a list of websites for two hours over a Wi-Fi connection. Safari on an iPhone 6s used 18 percent of a full battery; Chrome on a Moto X Pure Android phone used 22 percent. Installing the 1Blocker ad blocker on the iPhone reduced battery usage for the same test to only 9 percent of a full battery; on an Android phone, using the Ghostery Privacy Browser, which blocks ads, used only 8 percent of the battery.
3. Tweak your email settings.
Email can have a major impact on battery life if you have multiple email accounts and receive lots of email. Your smartphone can update your email automatically using a technology called push, which brings new messages to your phone the instant they are transmitted. Push can be a power hog because it requires your phone to constantly listen for new messages, so if you get a lot of email, there’s a good chance your phone is using lots of energy. The Wirecutter tested an iPhone 6s Plus configured with three email accounts, receiving a total of 20 to 30 messages an hour. In these tests, having push active over the course of a day caused Mail to account for 5 to 10 percent of the phone’s overall battery use. To save energy, most phones can be configured to instead check for (or “fetch”) emails on a schedule — say, every 30 minutes — or only when you manually tell your email app to refresh. 4. Play downloaded music instead of streaming. The next tip may come as unwelcome news. nowadays, online streaming is the most popular way to listen to music, with services like Spotify, Pandora and Apple Music — but this method guzzles lots of battery power. In the Wirecutter’s tests, streaming music over a Wi-Fi connection for two hours used 10 percent of an iPhone’s battery reserves; streaming the same music stored directly on a device over two hours consumed only 5 percent.