Conveniently charge two GoPro batteries simultaneously, plus give your camera an extra boost. This pack includes a Dual Charger and two advanced Enduro batteries that dramatically improve your HERO12 Black/HERO11 Black/HERO10/HERO9 Black's performance in cold weather to power through ski, snowboard and other winter shots at lower temperatures than ever before. They also extend recording times by up to 40% in moderate temperatures.