Amazon.com : GoPro Rechargeable Battery for HERO4 Black/HERO4 Silver (GoPro Official Accessory) : Electronics
Amazon.com : Smatree 1290mAh Replacement Battery Compatible for GoPro Hero4 (Pack of 2) Bundle with 3-Channel Charger and USB Cord : Electronics
GoPro HERO4 BLACK Battery Life info & comparison test VS 3+ Black edition - YouTube
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Core SWX Battery Eliminator USB with Backdoor DV-GP4-USBC B&H
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X~PWR™ All-weather, External Power Case for GoPro HERO3, HERO3+, & HER – 3BR Powersports
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GoPro HERO4, AHDBT-401 Battery (2-Pack) and Triple Charger by Wasabi P – Wasabi Power
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