I understand a lot of people are expecting more battery life out of the iphone 4s.
A lot of people just do not understand that a dual core processor uses a lot of battery life.
Also just like another user already posted , the phone always checks the time of day , reminders , etc.
All of these people who are getting a new phone are just getting the phone for no reason what so ever!
The new features of the operating system along with the dual core processor and some other upgrades is the reason why your phone does not have the battery life that your older iphone has.
I posted some tips before about how to save battery life. One user posted it back along with some other tips from other users as the best advice to save battery life. I will post them again and tell u a couple of new things that I discovered while using my iphone. I just want to tell everyone that this is my first iphone. I was an android user and had a Droid X. The Android phone died after about 4 hours of use and sometimes used 40 percent in one hour.
Here are some good random tips. But I have one tip that Most People Don't Realize. Keep Reading
1. There is definately a drain issue with the time zone setting. I tested it myself and watched it closely and it does use a lot more battery life with the option ON. So if you turn this option OFF , you will save some battery life.
2. Siri uses data. Data is collected through 3g. 3g uses a lot of battery life. ( I turned Siri Off Completely )
3. Location Services! When you open apps that require the gps built into the phone , this will use a lot more data. Think about it ! The Gps Reciever needs power , then the app is also using data from 3g , and the display at the same time. Just make sure that you turn off location services if you really don't need it. I only use it for Google Maps and I turn it off after that.
NOW I WANT TO USE BOLD ON THESE LAST 2 TIPS BECAUSE THEY ARE IMPORTANT.
1. When You charge your phone .... Plug your phone into the wall and look and make sure it is charging. When you see that your telephone is charging... TURN THE TELEPHONE OFF BY HOLDING DOWN THE POWER BUTTON. After the phone is off.... Let it charge. It will charge like this. I tried this and found that It helped a lot.
( I know that sometimes you need a quick charge and need to leave the phone on. This is okay sometimes but for maximum use ... Plug the phone into the wall with the phone on. Look and make sure it is charging on the battery icon. Then Turn The Phone Off and let it charge. You will not know when it get's to 100 percent because the screen will be off. You can turn it on to check but make sure u turn it right back off while it is plugged in. Charge it to 100 percent and get more battery life )
2. HOW YOU USE YOUR PHONE IS IMPORTANT. When you Open and Close an App , That uses battery life. In my opinion , closing an app uses more battery life than opening one. So you must get in a habit of not running through program after program after program ... touch after touch after touch ...
Find the program that you want to use... Use It.... And Do not switch through everything so fast.
Make sure you are not constantly closing down programs every 2 or 3 minutes. REMEMBER......
THIS IS A TELEPHONE AND NOT A DESKTOP COMPUTER. REMEMBER.... IT IS A PHONE AND NOT A PLAYSTATION 3!!!!!! Do NOT FORGET THAT THIS IS A PHONE!
I know these tips may seem lame but they work. They are tried... tested... and 100 percent sure to save you some battery life. I read most of the tips from this site except the last 2.
The Issue with charging the phone with the phone off really helped me a lot. I hope it helps you all to. The Iphone 4s is a really nice phone and you should enjoy it.