When you need to keep shooting, just replace the battery!
The Blackmagic Pocket Cinema Camera includes a removable and rechargeable lithium ion battery, which provides up to an hour of continuous recording time. The Nikon EN-EL20 battery type is commonly available, so you can purchase multiple batteries if you need to shoot for longer periods. The battery charge time is approximately 1 hour 15 minutes with the camera off. With a wide 12-20V power input range the camera can easily be powered and charged from larger professional camera batteries and other power sources.