Originally posted by Richdog Do these batteries suffer from memory effect, i.e., can I charge for 1.5hrs then use it then charge fully later with no ill-effects?
No problems. However, I wouldn't update the firmware with anything than a fully charged battery. Just in case. If your battery dies during a firmware upgrade, Pentax says that it is not user fixable and will need to be returned to the company...and it isn't every covered under warranty. I've never had a problem, but don't want to risk it.
It is said that the batteries come from the factory with a 40% charge. Something about that being the optimal charge for longevity (and shipping). Don't think you would hurt anything to just pop the thing in and play until you get home at night. Unless you are going to exercise the "continuous JPEG capture until the memory card is full", you probably will have enough juice to test out the camera.