Brunton all day gopro hero 3 power supply description when youre charging hard make sure your gopro has the juice to keep up the all day high capacity power supply extends the power of your hero3 nearly 4 times the specified run time and still maintains the all weather durability your gopro promises plus the all day doubles as a portable power device allowing you to plug in your cell phone or tablet to charge up when filming your next hero moment features weatherproof water r