GoPro Rechargeable Battery for HERO4 Black/HERO4 Silver ( GoPro Official Accessory) - Walmart.com
4Pcs 1680mAh Gopro Hero 4 Battery Replacement + LED 3 Slots USB Charger for GoPro HERO4 GoPro AHDBT 401 Action Camera Bateria|Digital Batteries| - AliExpress
GoPro Hero4 Session Teardown - iFixit
GoPro Rechargeable Battery (for HERO4)
Smatree 1290mAh Replacement battery for GoPro Hero4 (Pack of 2) Bundle with 3-Channel charger and USB Cord for Gopro Hero 4 Camera Camcorder-Smatree Gopro Accessory
Amazon.com : Smatree Battery (3 Pack) and 3-Channel Charger Compatible for Gopro Hero 4 (NOT for Hero 5) : Electronics