The brunton all day power pack is the perfect accessory for any gopro hero 3 owner if you find you have hours of footage to shoot but not enough power supply then this is the accessory that you need in your life this brunton all day power pack extends the gopro39s battery life to nearly 4 times the specified run time whilst still maintaining the all weather durability your gopro has promised this camera accessory also comes with a portable power device that allows you to plug your ph