Amazon.com: TOMSHEIR Replacement Batteries for Gopro Hero 8/7/6/5 (3-Pack) and USB Fast Charger, Black (Fully Compatible with Official) : Electronics
Amazon.com: KUNLUN 3-Pack Batteries for GoPro Hero 8/7/6 Black and 3-Channel USB Fast Battery Charger Station Bundle for GoPro Hero 8 Black, Hero 7 Black, Hero 6 Black Camera(Fully Compatible for Original) : Electronics
Best Buy: Digipower Rechargeable Lithium-Ion Battery for GoPro HERO7 Black, HERO6 Black, HERO5 Black & HERO RF-6H50
GoPro Hero 9 vs 8 vs 7 - Battery life Test comparison and overheating. - YouTube