Amazon.com : Wasabi Power Battery for GoPro HERO3, HERO3+ and GoPro AHDBT-201, AHDBT-301, AHDBT-302 (1200mAh, 2-Pack) : Electronics
Watson Lithium-Ion Battery Pack for HERO3 & HERO3+ B-2302 B&H
TOMSHEIR Replacement Batteries for Gopro Hero 8/7/6/5 (3-Pack) and USB Fast Charger for GoPro Hero 8 Black,Hero 7 Black,Hero 6 Black,Hero 5 Black (Fully Compatible with Official) - Walmart.com
4pcs 1250mah Hero 3 Gopro Hero3 Battery Replacement + Led Dual Usb Charger For Gopro Go Pro Hero 3 3+ Cameras - Digital Batteries - AliExpress