""Recording time will vary according to the resolution setting used and the card capacity. Here are the average recording storage times for an HD HERO2 camera with a 32GB SD card: 1080p (30 fps): 4h 21m. 960p (30 fps): 5h 26m."" That would lead me to believe around 16Hours is possible give or take....so easily a hunt or two so long as power never runs out.
Sure make me look silly by just doing a Google search ... Just kidding ... for some reason I never though of that. I don't think the looping would be a bad idea. I mean if I was shooting a turkey, I typically go out and pick up the bird right away (head/neck shot), so even if I was hunting on a second tag, I could press the start/stop record button and start a new 20 minute loop file. I am going to play around with it some. Maybe on some goose hunts over the course of this winter, that way I don't mind if I loop over footage.
You can, but that cable is a better option. If you plug the external battery into the GoPro via a USB cable, you are actually not running the GoPro off external power, you are charging the GoPro battery. That creates heat which can potentially create a problem or shorten the life of the GoPro. For $20 bucks, I like using the cable.
Yes, I just let it run. I get just about 9 hours on a 128gb card when at 1080-60. My fear with loop mode is let's say I shoot an animal at 19 minutes into the loop. I take 5 minutes to settle down and realize I need to turn the GoPro off, and it's too late. The shot is gone and you can't recover it. I just let it run with that Refuel 12 hour battery and I can literally record the entire day.
Loop doesn't work exactly like that. It actually stores the video in two minute sections, with 10 sections saved to the card at all times. Once 10 sections are on the card, it will start to replace them one at a time, starting with the oldest. So in the situation you mentioned, you'd be fine. But, I still think the way you do it is actually safer. Sure you have more dead air on the card, but who cares. You are guaranteed to get that all important three minutes of action. Also - I agree with what others said about leaving the battery in and plugging it in ... the battery does get very very hot, and I found it shortens their life. The battery eliminator cord doesn't get hot.
LOL I originally tried thinking how many 10 sec vids I get on my 8GB trail cam cards but then gave up the math and googled.