Battery Batmax for Gopro 4 1680mAh - the battery classification GoPro has AHDBT-401 index. It is suitable for GoPro Hero 4 Black and 4 Silver GoPro Hero cameras. The capacity of this battery is higher than the original, and is 1680 mAh. This is sufficient to ensure recording for from 50 minutes to 2 hours (depending on the recording resolution and included Wi-Fi).
The battery has a handy strap for its rapid removal from the chamber. Charge it may be directly in the cell or by an external charger. AHDBT-401 battery for GoPro Hero cameras 4 - has an energy density, low self-discharge, lack of "memory effect" and the ability to rapidly charged