Is it just me, or is the battery life on this thing not good at all? I just bought a brand new Q3HD two weeks ago, and have tried using it at a couple of our practices. I get a half hour of recording time, and then it powers down! I am recording at 720p/60fps and 192 kbps for audio. The second practice, I was using a brand new 32 gb memory card, so I know that's not the issue. Anyone have similar experiences? Do I need to adjust my settings, or simply go to always using the AC adapter with it?