Extended Battery for GoPro HERO7/HERO6/HERO5 Black – Digipower
GoPro Rechargeable Battery (for HERO4)
GoPro Hero4 Session Teardown - iFixit
Amazon.com : GoPro Rechargeable Battery for HERO4 Black/HERO4 Silver (GoPro Official Accessory) : Electronics
5200mah Power Bank 30m Waterproof External Battery Bank For Gopro Hero 10/9/8/7/6/5/4/3+/3 Yi 4k Sjcam Action Camera Accessories - Sports & Action Video Cameras Accessories - AliExpress
GoPro HERO4, AHDBT-401, AHBBP-401 Battery (4-Pack) by Wasabi Power
GoPro HERO4, AHDBT-401, AHBBP-401 Battery (4-Pack) by Wasabi Power
Aopuly Gopro Hero 4 Battery and Dual Charger for GoPro HERO4 GoPro AHDBT 401 HERO4 HERO4 Black Silver action camera Bateria|battery for gopro|camera batteryahdbt 401 - AliExpress
5200mah Waterproof External Power Battery + Skeleton Housing Case With Cable For Gopro Hero 4 3+ 3 Cameras Diving Accessories - Sports & Action Video Cameras Accessories - AliExpress