Amazon.com : Wasabi Power Battery for GoPro HERO4 and GoPro AHDBT-401 (4-Pack) : Electronics
Amazon.com : GoPro Rechargeable Battery for HERO4 Black/HERO4 Silver (GoPro Official Accessory) : Electronics
Amazon.com: GoScope HERO4 Dual Charging Dock + Spare Battery - HERO4 / HERO4 Black / HERO4 Silver / HERO4 White : Electronics
Amazon.com: Sabrent 2 Pack Battery Set with Dual Battery Charger for GoPro HERO4 [AHDBT-401, AHBBP-401] (GP-KTH4) : Electronics
Amazon.com: Suptig Portable Charger, 7800mAh Waterproof Power Bank, Compatible for Gopro Hero 10 Hero 9 Hero 8 Hero 7 Hero 6 Hero 5 Hero 4 Hero Session Hero + DJI osmo AKASO Digital Camera and Smartphone : Electronics
GoPro Hero4 Black review: Smooth 4K video that's still the best in the category - CNET
Amazon.com : Suptig Housing Rechargeable Waterproof housing for GoPro Hero 4 Hero 3+ Hero 3 Outside Action Camera for Underwater Charge Use - Water Resistant up to 131ft (40m) : Electronics
Amazon discounts GoPro Hero10 Black bundle with extra batteries to $400