Amazon.com : PowerTrust 4-Pack AHDBT-401 AHDBT401 Battery for Gopro Hero 4 AHBBP-401 Digital Battery and AHDBT 401 Dual USB Charger for GoPro Hero4 HERO4 Camera : Electronics
Watson Mini Duo Charger for GoPro HERO4 Batteries
PROtastic® Dual USB Battery Charger for GoPro Hero 4: Amazon.co.uk: Electronics & Photo
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Amazon.com : PowerTrust 4-Pack AHDBT-401 AHDBT401 Battery for Gopro Hero 4 AHBBP-401 Digital Battery and AHDBT 401 Dual USB Charger for GoPro Hero4 HERO4 Camera : Electronics
Amazon.com: Suptig Battery (2 Pack) and Daul Charger for Gopro HERO4 Black Gopro HERO4 Silver and Gopro AHDBT-401 : Electronics