GoPro Rechargeable Battery Compatible for HERO4 Black/HERO4 Silver ( GoPro Official Accessory) - Walmart.com
Amazon.com : GoPro Rechargeable Battery for HERO4 Black/HERO4 Silver (GoPro Official Accessory) : Electronics
Core SWX Battery Eliminator USB for GoPro HERO4 (10 ft)
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