Got my K-30 less than a week. Left home for my Dallas trip 2 days after I have received the camera so I didn't have time to order a backup battery.
So I am on the road with just one battery inside the camera and one 16gb sd card.
I took 1200 shots (hi-speed multi-shots) at my nephew's basketball tournament in the morning and then took another 1000+ shots at the Rodeo show my brother-in-law took me to in the evening on the same day, with the same battery and still have juice left when we are done for the day.
None of the shots were taken with flash though.
So far, I am happy with the battery performance.