This extended battery attaches to the back of your GoPro to increase battery life. It"s perfect for long-duration photo sessions, wet conditions, or any application where you need extended battery life. You can charge it inside the GoPro camera or by using the included Wasabi Power LCH-DC-AHBBP301 Dual Charger. Battery Run Time (2780mAh)*: 5 hours with 1080p 30fps (WiFi and Protune off) 3.5 hours with 1080p 60fps (WiFi and Protune off) Battery compatible with: GoPro Hero3+ (Silver, Black) GoPro Hero3 (White, Silver, Black) Note: This battery is NOT COMPATIBLE with the GoPro HERO4 or HERO2. Includes: Wasabi Power Extended Battery (BTR-ABPAK304-JWP) Wasabi Power Dual Charger (LCH-DC-AHBBP301) Extended Standard Backdoor for HERO3 and DIVE housing (waterproof 60m) Extended Standard Backdoor for HERO3+ housing (waterproof 40m) Extended Skeleton Backdoor for HERO3 housing (not waterproof) Extended Skeleton Backdoor for HERO3+housing (not waterproof) Battery can be charged with: Wasabi Power Dual Charger (LCH-DC-AHBBP301) GoPro Dual Battery Charger (AHBBP-301) GoPro Hero3+ or Hero3 Camera *Note: The above times are based on continuous recording. Various conditions can reduce battery life such as cold weather, enabling WiFi, stopping/starting recording, or powering camera on/off repeatedly.