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
GoPro Rechargeable Battery | Ole Florida Fly Shop
SANDMARC Procharge - Triple Charger for GoPro Hero 4, 3+ and Remote