3GS Battery Issues

Looking for input from others on their experience with the 3GS battery. Have heard mixed things from good to bad.
I think that my particular unit is questionable. I compare it to my wife's 3G and find a discrepancy in performance. Mainly in reference to standby
For example: My phone requires a minimum 50% charge to make it through the night and still be on in the morning. My wife's, however, will go on standby with a 20% charge and still have 10% left in the morning. Obviously, this is a precision test...but you can see the obvious disparity.
It takes the phone about 4 hours to charge completely, which I believe is probably standard.
I am wondering if there is a standby feature that is not enabled or something. With minimal use the phone will last for about 10 hours before shutting down. Heavy use will see about 5-6.
I guess It just seems that it should stand by for a longer period, and I'm getting this from comparing it to the 3G.
Let me know what you are getting out of the unit.

Ok, so the link is helpful and I'll take note of battery life with new settings, including:
Wifi off
Push off
Email check hourly
and Location Services off
Also helpful to know that you are looking at a charge cycle every few days. This has never been the case for me, and is what I am expecting to see with these changes. If battery issues persist, I suppose I'll take it in.
I'd still like to hear input from a few other people on this matter. Would be greatly appreciated

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