Amazon.com : Hero 4 Battery, Pickle Power AHDBT-401 Battery and LED Display Charger for Gopro Hero 4 HERO4 Black HERO4 Silver and Gopro AHDBT-401 : Electronics
Extended Battery Module For GoPro 11, HERO10 Black & HERO9 Action Came – Digipower
Amazon.com : Hero 4 Battery, Pickle Power AHDBT-401 Battery and LED Display Charger for Gopro Hero 4 HERO4 Black HERO4 Silver and Gopro AHDBT-401 : Electronics
5200mah Waterproof External Power battery + Skeleton Housing Case with Cable for Gopro Hero 4 3