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3. Tweak your email settings.
3. 优化邮件设置
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.
如果你拥有好几个邮件账号，并且收发大量邮件，电子邮件对电池使用时间会有很大影响。你的智能手机会使用推送技术自动更新邮箱情况，一旦收到邮件就立刻在你的手机上显示新信息。推送可以成为耗电大户，因为它需要你的手机一直接收新消息，所以如果你有很多电子邮件，你的手机就会耗很多电。
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.
Wirecutter测试了一台有三个电子邮件账户，每小时收20到30个邮件的iPhone 6s Plus手机。在这个测试中，如果打开推送，每天会令邮箱多耗5%到10%的电池电能。
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.
为了节省电能，大多数手机都可以设置定时检查（或“获取”）邮件，比如每30分钟获取一次，或者手动更新。
