My first weekend day w/the camera. My son's baseball game, beautiful sunny day, G3, Lensmate adapter and Canon 1.75x tele, and two 256 MB CF cards. I'm ready to rock and roll!!
20 or so minutes into the game, I notice that my battery level warning is showing only one bar. Just switched from full to "game over" w/out any warning, as noted here.
I could not believe it. I had charged the camera on Wednesday at about 1:00 PM and played w/it constantly since then. I should have thought of charging it up before the game, but I was busy and... 
Oh well, lesson learned. Ordered a couple spare batteries today so I won't be left in the lurch in the future.
Luckily, there were a couple of power outlets at the park so I went home (2 minutes away) got the adapter and my trusty oly 2020z and used it while I charged the G3 until the 5th inning.
C
Kind of funny - especially after I was forewarned here...you can take a G3 owner to knowledge, but you can't make him think.
Dana