The GoPro Dual Battery Charger charges up to 2 batteries for the HERO7 Black, HERO6 Black, HERO5 Black, and HERO 2018. It also includes a spare battery.
Simply plug the charger in using the included USB cable to charge your batteries. When combined with the separately available Supercharger, you can expect up to 45% faster charge times. Charging status is displayed via built-in LEDs. Amber means charging, and green means you're ready to roll with a topped-off battery.