Smatree 3 x Batteries with 3 Channel Charger Compatible with GoPro Hero 8 Black / 7/6 Black and Hero 5 Black Firmware V2.70: Amazon.co.uk: Electronics & Photo
Hahnel Trio Charger for GoPro Hereo3/3+/4 include Battery CHLGPTCWB | C.R. Kennedy
GoPro Hero 4 Vs 3+ Vs 3 Comparison - Unsponsored
GoPro HERO3, HERO3+ Battery (1280mAh, 2-Pack) by Wasabi Power
GoPro Hero3 Third Party Battery Comparison / Review - YouTube
Smatree Battery (3 Pack) and 3-Channel Charger Compatible for Gopro Hero 4 (NOT for Hero 5)
Amazon.com : Smatree 1290mAh Replacement Battery Compatible for GoPro Hero4 (Pack of 2) Bundle with 3-Channel Charger and USB Cord : Electronics
I tried using an extended battery "L40G4" that makes GoPro's battery last longer than three times - GIGAZINE
Smatree 1290mAh Battery 3 pack With 3-Channel Charger USB for GoPro HERO 4 | eBay