As I understand it constantly charging the battery from a non-discharged state can soon limit it's effectiveness and dramatically shorten its lifespan. And given that the iPhone does not have a removable battery I'm not sure this is the wisest of moves.
Please feel free to correct me on this.
I’m hearing a lot of complaints about the iPhone 4S (and for that matter iOS 5) in general related to battery life. It seems that some people are finding that they’re not getting as much out of their battery as they used to.
Want to uncover iOS 5 ’secrets’? Check out these posts! Part 1 | Part 2
It’s seems that excessive battery consumption is a common complaint for the initial releases of iOS updates, and something that gets fixed by Apple (or at least improved on) with subsequent updates.
Fortunately, there’s a lot you can do to help you squeeze more out of each charge. Let’s take a look at a few things you can do.
Note: I’ve tested every single one of these options and each one does seem to have a positive impact on battery life. I’m not suggestion you employ all of them, but turning off what you don’t use makes a lot of sense.
Drop the screen brightness
One of the easiest ways to improve battery life on the iPhone is to drop the screen brightness. When I updated my iPhone 4 from iOS 4 to iOS 5, Apple jacked the brightness up to an unnecessary ’supernova’ level. Unless I’m outdoors, I usually keep my screen pretty dim.
Settings > Brightness
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