Print 
We've all grown accustomed to the fact we can't swap out our iOS device's battery whenever we feel like it, so it is important to know how to prolong its life. This weeks tips will help you to get the most out of your iPhone, iPod touch, or iPad battery.
Lock your iOS Device
Make sure that your iOS device goes to sleep automatically when not in use. This can be done by pressing the Sleep/Wake button, but an even better solution is to setup the Auto-Lock feature in Settings>General>Auto-Lock in case you forget to hit the button. We set ours to one minute.
Applications
Apps that keep the display from dimming, turning off, or keep an iOS device from sleeping can reduced battery life. Especially if the app uses Push Notifications or Location Services.
You can turn Location Services off in Settings>General>Location Services.
You can turn off all Notifications or turn off Push Notifications for each app that supports this feature individually, in Settings>Notifications.
Push Notifications for E-mail
The iOS Push functionality for Exchange and MobileMe accounts also can destroy battery life.
Turn this option off in Settings>Mail, Contacts, Calendars>Fetch New Data before restarting your iOS device. Messages sent to your push e-mail accounts will now appear on your phone based on the global Fetch setting (every 15 minutes, every 30 minutes, hourly, or manually) rather than as they arrive. The manual Fetch setting will preserve the most battery life.
Turn Off Wi-Fi and/or Bluetooth
Be sure to turn off these features when not in use.
Go to Settings > Wi-Fi and set Wi-Fi to Off.
Go to Settings > General > Bluetooth and set Bluetooth to Off.
Apple has noticably improved battery life on the iPhone 4, but some older iPhone model owners are are complaining about battery problems after applying the iOS 4.1 update. These tips will help those users lengthen the life of their iPhone battery, but regardless of the iOS device you own you'll have the option to optimize your battery usage any time you wish with these tips.
My detailed battery tips are based on Apple's own recommendations for prolonging the life of your iOS device's battery. I'll have some additional battery saving tips in a future tip column, but in the meantime these can be useful for any iOS device model -- iPhone, iPod touch, or iPad.
These tips sacrifice your iOS device features to prolong battery life and if you cannot live with that then you need to consider purchasing battery extenders like Griffin's TuneJuice, Just Mobile's Gum Pro, or one of the mammoth batteries from HyperMac.
Follow this article's author, David W. Martin, on Twitter.
Doc Izzy
September 21, 2010 at 10:47am
When someone tells me their iPhone is suddenly experiencing about half a day of battery life, almost every time it's because they recently set "Auto-Lock" to something other than "1-minute". Most people do not manually put their iPhone to sleep by pressing the sleep button; the Auto-Lock does it for them. When Auto-Lock is set to never or something other than 1 minute, battery life takes a hit.
When I'm told an iPhone is only lasting about 5 hours I almost always see Auto-lock set to never - this makes sense because when the screen is on the iPhone is "in-use" and the iPhone gets 5 hours of usage time on one charge (or more depending on model). When a person has it set to something more than 1-minute I ask them to guess how many times an hour they access the iPhone. Most guess around 5 times. I point out that unless they are putting the iPhone to sleep manually, having it set to auto-lock after 5-minutes means that it is on for 20 minutes more than it has to be every hour (using it 5 times multiplied by the 4 extra minutes). That would mean that over the course of 3 hours their iPhone was in use an additional hour than it needed to be.
So if you're having battery issues, especially if it suddenly started happening, check your Auto-Lock settings.
kylerwalker
September 20, 2010 at 7:11pm
it seamms every day at the end of the day the batterys dead or vary low thanks for the tips
