I just bought a Panasonic DMC-G5 and my first impression is that I love it. I see a lot of people recommending a spare battery, but I'm surprised to see no discussion on specific spare batteries. The Panasonic spare is, as always, pretty overpriced, but I bought a third-party spare for my previous camera (DMC-FZ50) that didn't last nearly as long as the OEM battery. Is there any consensus out there on what batteries are the best deals? Is there any specific advantage, besides longevity, to one battery over the other? I noticed a few people claiming in Amazon reviews that a given battery doesn't work with the camera's battery indicator (a problem I've never seen in any device before when using a different brand of battery). I also see that quite a few of the third-party batteries are rated at 7.2V 1500mAh instead of the OEM battery's 7.2V 1200mAh - which of them live up to that claim and actually allow for longer shooting sessions than the Panasonic battery? If the $10-20 third-party batteries work as well, almost as well, or even better than the $60 Panasonic battery, I'd obviously rather buy them as spares.