EPIC L40G4

What's in the box?

4000mAh External Battery for GoPro Hero4

(1) 40 Meter back housing

(1) 60 Meter back housing

specifications
BATTERY CAPACITY 4000 MAH / 14.8 WH
BATTERY CELL LITHIUM-ION
Volts 3.7
INPUT CHARGING TIME 5 - 8 HOURS
CYCLE LIFE OVER 500 USES

Performance (Battery Life: Resolution@frames per second)
Depending on device

1080@60FPS 5 hours 42 minutes
1080@30FPS 6 hours 24 minutes
4k@15FPS 4 hours 38 minutes
720@120FPS 7 hours 50 minutes