Want to save battery life on your iPad 2 or iPhone 4?  Switch up the data push frequency.  

The process of data exchange is a drain on battery life. So Apple has given users a great deal of control over how often the iPad 2/iPhone 4 fetch new data. In Settings -> Mail, Contacts, Calendars -> Fetch New Data, try setting Fetch to Every 30 Minutes or even Hourly if possible.

You can get even more granular: for email or calendar accounts that are used infrequently, go to Settings -> Mail, Contacts, Calendars -> Fetch New Data -> Advanced. You can then set each one to Manual rather than Fetch.  Once set to Manual, email accounts will only push new emails when the Mail app is opened and calendar accounts will only sync when the Calendar app is opened.

See Tip and Trick #30: Type in Multiple Languages

See Tip and Trick #29: Character Count Your Text Messages

See Tip and Trick #28: Accessing the Scientific Calculator

See Tip and Trick #27: Zooming on Google Maps

See Tip and Trick #26: Accessing “iPod” While Device is Locked

See Tip and Trick #25: Adding Accents While Typing

See Tip and Trick #24: Search Web/Wikipedia from Home Screen

See Tip and Trick #23: Quick Call Handling

See Tip and Trick #22: Email Web Pages

See Tip and Trick #21: Enabling “Caps Lock”

See Tip and Trick #20: Take Images Straight off Safari

See Tip and Trick #19: Setting the “Home Button” Double-Tap

See Tip and Trick #18: Invert Display Colors

See Tip and Trick #17: Turning Web Pages into Icons

See Tip and Trick #16: Refined Spotlight Search

See Tip and Trick #15: Ditch typing URL Extensions in Safari

See Tip and Trick #14: How to Sync Your Boomarks Using iTunes

See Tip and Trick #13: How to Use Enhanced Camera Functionalities

See Tip and Trick #12: Shut Down Running or Suspended Apps

See Tip and Trick #11: How to Create Folders

See Tip and Trick #10: How to Edit and Create Documents

See Tip and Trick #9: Set the Device to Self Destruct

See Tip and Trick #8: Choose an App for Opening an Attachment

See Tip and Trick #7: Orientation Lock the Screen

See Tip and Trick #6: Forget a Wifi Network

See Tip and Trick #5: Change Your Email Signature

See Tip and Trick #4: Take a Screen Shot

See Tip and Trick #3: Download the PDF User’s Guide

See Tip and Trick #2: Check a URL Destination Before Opening It