Wasabi Power Extended Battery for HERO4, BTR-ABPAK401-BDOORS B&H
Amazon.com : Complete AC/ DC Power Kit for GoPro Hero 3+ and Hero 4 (Not compatible with Hero 3 & older) Includes USB Power Cable,Water-resistant Backdoor Passthrough,and 3 Adapter Plugs (US &
GoPro 4 & 3 Battery Eliminator for Motovloggers! RECORD ALL DAY! - YouTube
GoPro HERO (2014 Model) Extended Battery by Wasabi Power
Amazon.com: Batmax 3 Packs 1680mAh AHDBT-401 Battery + LED Dual USB Charger with Type C Port for GoPro Hero 4 Black/Silver Action Cameras : Electronics