Originally posted by Ben_Edict The batteries in the K20 are MUCH better than AAs: less bulky and last looong. Form the two batteries (camera and grip) I get way over 1000 shots out of the camera (more like 1400-1600), even with immediate review on the lcd all the time. So I consider this to be another advantage of the K20.
If you use the grip with the K200D, you should *also* get over 1000 shots per charge. At least, I assume so - I don't have the K200D grip. But minus grip, both cameras get about the same battery life from everything I've heard; I'm assuming adding the grip basically doubles that.
As for other advantages or disadvantages of the battery types, that's an ongoing debate. The K20D battery is less bulky, no doubt. But that doesn't even come close to outweighing the numerous advantages of AA in my book (available anywhere, available "forever", benefits from future technology advances, interchangeable with other devices, ability to use one charger for all devices, etc). But it's a personal choice, to be sure.