Oops, sorry just seen this thread.
I find the Pentax good for about 1000 shots (timelapse) before it runs out. Less if you have the flash on. Less if you like to compose with the LCD screen, take, review, show it to your mate, review again, pop around in the menus, etc...
Oh, and in terms of bouncing and lashing, can I add 'tied to a kite', 'dropped down a slide' and 'accidentally dragged behind a boat'.
Still working. Case is less pretty than it was though