1 Charges HERO5 Black and HERO5 Session up to 20% faster, Dual Battery Charger (HERO5 Black) up to 45% faster and Karma Grip up to 70% faster. The in-box 3A USB-C cable is required for fast charging. Performance may vary. 2 5V 1A USB charger. 3 Ensure your device is compatible with the charger before use.