Originally posted by Brooke Meyer Routinely got 2 to 3k out of a battery on my K5IIs bodies during dance performances. Always kept a spare battery in my pocket for quick change in in the dark, just in case. My K3II bodies use the identical battery up faster, maybe 2k+ but not as long as the K5IIs. In any case, keep a spare charged battery with you and it's a non issue.
I use the screen for reviews and some bad image dumping, continuous AF all the way, bursts, ISO up to 800, usually around 320, and 2k per full battery is normal.
I do however switch battery when it drops 1 to minimise battery degradation, and also the camera seems to loose burst speed after that.
Just beware, when the battery meter drops 1, you're way past 1/2 charge.