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All the goodness of iPhone OS 3.0 aside, the one thing you’ve probably noticed after updating your iPhone or iPod touch is how quickly its battery is draining.
I certainly did, along with many other users. The battery life of my iPhone 3G is now barely six hours, a huge departure from the 12+ hours or so I would get with 2.2.1. And even though I’d experienced a decrease in battery life with the beta builds of 3.0 back in May, the battery never drained at a rate as alarming as this. Now, it depletes 10 percent every hour even while the phone is left doing absolutely nothing.
My first thought was that push notification must be the cause of this. But even after turning off push notification, the battery continued to drain at an alarming rate. After some investigation, it would seem that the culprit is, instead, iPhone’s push mail setting.
To turn off push for all mail accounts, follow these steps:
- On the Home screen, tap the “Settings” icon.
- Tap “Mail, Contacts, Calendars.”
- Tap “Fetch New Data.”
- Turn off “Push.” This turns off push, in one step, for all email accounts that are enabled for it, while preserving the “Fetch” settings you may have already set for every account.
- Reboot your iPhone. To do that, hold down the Sleep/Wake button (the one at the top) until you see the red slider appear, then drag the slider.
After your iPhone has restarted, you should see an improvement in its battery life. Leave a comment, and tell us if this works for you!