Submitted by Conner Carey on Sun, 06/26/2016 - 06:00
When the Push option is turned on, information updates are sent to your iOS device as your provider receives them. However, leaving Push on all the time consumes battery power. Unless you need your emails to reach you immediately, you should turn Push off and use the Fetch option, which checks for messages periodically. Here's how to save battery by setting Fetch frequency for mail.
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To do this,
Select Mail, Contacts, Calendar.
Tap on Fetch New Data.
If Push is on, turn it off.
You can also select individual Mail accounts and choose Push or Fetch instead. This will allow some mail accounts to update more frequently.
In the Fetch section, select how often you want your device to check for mail. Your options are Every 15 Minutes, 30 Minutes, Hourly, or Manually.
This will help conserve battery life by fetching mail less frequently. The greater the interval, the more battery you'll save.