Actually, equally frustrating to running out of battery is running out of memory, especially with the standard GoPro display where you can’t tell if you’re about to delete footage you haven’t backed up yet or not.
There’s two option here: either bump up your one memory card to the biggest you can afford and make sure you always save it to your computer at the end of each day, or carry a spare. If you do, make sure you have it in one of these bomb proof card cases for safety – our editor will testify to that after his camera bag got run over by a snow cat last season!