Hi rlvay.iphone,
You might find the following resource helpful in troubleshooting iPhone battery life:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Battery life seems short
Click (www.apple.com/batteries/iphone.html) for tips on how to prolong iPhone's battery life.
Try turning iPhone off and then on again.
Connect iPhone to iTunes and restore iPhone.
If the screen shows a low-battery image, the battery is low on power and needs to charge for up to ten minutes before you can use it.
When charging iPhone, make sure to leave it charging until it is fully charged. You'll know the battery is fully charged when the battery icon in the upper-right corner of the screen looks like this .
Note: When charging using a computer, don't connect iPhone to a keyboard. Also, the computer must be turned on and not in sleep or standby mode. If iPhone is connected to a computer that's not turned on or is in sleep or standby mode, the iPhone battery may drain.
Note: Charging with a FireWire-based power source is not supported, except on original iPhone.
If you continue to have battery-life issues, we may need to isolate the issue further. It might be best to restore your iPhone as new, then test once more:
iTunes: Restoring iOS software
http://support.apple.com/kb/HT1414
Thanks,
Matt M.