Comment GoPro. (Score 1) 133
I use a battery eliminator with my GoPro Hero 3+ Black, together with an external (11500 mAh) battery pack. The combo will power the GoPro for far longer than the (maximum supported) 64GB microSD card has video capacity. Perfect for long cross-country flights that exceed the ~1.5-2 hours of internal battery capacity (the internal battery is 1150-1200 mAh, so the 11500 mAh external is good for about 18 hours of video recording; a 64GB microSD card can hold about 7 hours of video).