Suppose its what you do with your unit !

I dont listen to music with it as I use an ipod touch.

I dont play games on it as I again use my ipod touch if im really bored.

I do send loads of texts and make and rcv calls.

I do use it heavily for the internet.

I do use auto disconnect and have tweaked the usual settings like screen brightness etc etc.

I do power it down at night.

You can overclock but im not convinced it wont decrease the life of the fone !

I 100% do not have terrible battery life.

Battery lasts a couple of days.

Just for a little balance go and look at other user forum threads concerning their smart fones and standard fones and you will see its a bug bear across the board on battery life ! Always has been.

Nature of the bear !

Carry a spare battery or have a charger/usb cable where you work i order to give it a charge if required.