IOS 6 is battery hungry in my iPhone 4S device

Since I updated my iPhone 4S for the IOS 6, my device cannot use longer than 6 to 8 hours.
I researched on internet about, and I found a probably solution: turn on iTunes in my pc and plug in my iPhone. After that, open Edit > Preferences > Devices, and select "never permit iPods,iPhones, iPads syng automaticaly", and press "OK". Surprisily, my device has 49% of battery after 10 hours using!!! Amazing!!!
But, as I want to permit all devices be synging automatically, I unmark the option "never permit iPods,iPhones, iPads syng automaticaly", and the battery life keeps running well.
If you face the same situation, try it.

See your other post on this topic...
https://discussions.apple.com/message/21874789#21874789

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