Black's Media's power solution to the ongoing GoPro Hero 3 battery life issue.
Portable battery with 2 USB outputs, enabling you to power one GoPro Hero 3 for 18 hours, or two for 9 hours.
Complete with splashproof peli casing to keep battery and connectors safe from rain. Cables go into the GoPro using special made GoPro casing, keeping the GoPro also splashproof.
This is perfect for timelapse, or long shoots such as track days where you do not have the time or opportunity to change over batteries.