Hi jwell and welcome to the Q&A Board!
You didn't say what type of rechargeable batteries you're using but you should use NiMH to get the most shots out of a single charges. Alkaline batteries don't last at all, as you've experienced.
Check out this section on batteries:
http://www.digicamhelp.com/digital-camera-batteries/digital-camera-batteries.htmAnd click the links to more information about battery capacity and battery chargers and features:
Rechargeable batteries need to be reconditioned every now and then. You can do it manually by completely depleting the batteries then fully recharging them. Or you can get a charger that does it for you, called a Smart Battery Charger.