Originally Posted by JCSullivan 
I had the K100D and got rid of it promptly for just that reason - batteries. Many will NOT agree with me but, others WILL.
Depends on your expectations and what you've tried. If all you've tried are alkalines or low capacity rechargeables, not surprise you'd be disappointed - anyone would be. But high quality rechargeables including the easy-to-find Sanyo Eneloops and - give you over 500 shots per charge. If you're disappointed with 500 shots per charge, that's OK, and a legitimate reason to switch to a camera that does better. But if you're switching because you weren't getting anywhere near 500 shots, you were simply using the wrong batteries, and a $10 set of Eneloops would have fixed the problem instantly.