Amazon.com : External Battery for GoPro/Mevo. Accessories for Go Pro Hero 11 10 9 8 7 6 5. JUICEBANK 7800mAh 6-9hrs. YOLOtek Veteran Owned. Great on GoPro Fence Mount for Baseball. Best Battery Power Bank! : Electronics
Amazon.com : SOONSUN Standard Waterproof Case Dive Housing for GoPro Hero 4 Black, Hero 4 Silver, Hero 3+, Hero 3 Cameras with BacPac Backdoor for Extended Battery or Bacpac Screen – Waterproof Up to 40 Meters : Electronics
Amazon.com : Waterproof BacPac Back Door Case for GoPro BacPac LCD Screen/Expansion Extended Battery BacPac, for GoPro Hero 3 Original Housing Case : Electronics
Amazon.com : GoPro Battery BacPac for Hero3+ : Electronics
Extended Battery for GoPro HERO7/HERO6/HERO5 Black – Digipower
Extended Battery Pack for GoPro HERO4, HERO3+, HERO3 [with Backdoor Ho - Sabrent
Extended Battery for GoPro HERO7/HERO6/HERO5 Black – Digipower
Brunton All Day 2.0 Extended Battery Pack for GoPro Hero, Hero 3+, Hero 4 - ASD
I tried using an extended battery "L40G4" that makes GoPro's battery last longer than three times - GIGAZINE