https://gopro.com/help/articles/Question_Answer/How-Long-Does-the-HERO5-Session-Battery-Last
Video Only Video + EIS Video + EIS + Wi-Fi ON Video Mode Estimated Time Estimated Time Estimated Time 4K/30 W 1h 20m N/A 1h 15m (EIS off) 2.7K/30 W 1h 40m 1h 30m 1h 25m 1080/60 W 1h 35m 1h 25m 1h 20m 1080/30 W 1h 55m 1h 40m 1h 40m 720/120 W 2h N/A 1h 45m (EIS off)