Powerful Battery The HERO9 Black's 1720mAh battery has a 30% longer battery life than the battery of the HERO8 Black. Gopro hero9 waterproof 5k camcorder + ext batt + 32gb bundle mother's day sale once applied, not affected by heat or cold. Expandable Mods System The HERO9 Black is compatible with multiple add-on mods that expand the camera for a more comprehensive workflow.