Extend Any DSLR Battery Life to 12 Hours with Case Relay Camera Power System

Extend Any DSLR Battery Life to 12 Hours with Case Relay Camera Power System

For filmmakers, stopping to swap out batteries isn’t always an option. But when that red light is flashing, and your camera battery is dying, something must be done. Consistent camera up-time is critical in video, time-lapse, and on a long photo shoot. A pause to swap out batteries can mean a missed shot and wasted time on set. Never miss a moment again with the Case Relay, a first of its kind, this innovative device provides uninterruptible power for a DSLR or mirrorless camera using any standard 5V USB external battery pack.

Burning Boat Media are filmmakers from Copenhagen, Denmark who recently created the below tutorial video featuring the Case Relay Camera Power System. In this video, they’ve rigged their Sony A7R II with two 15mm rods, a Case Relay Camera Power System, camera coupler, and two external USB battery packs to provide 12 hours of power to their camera.

If you’d like to mimic this setup, you’ll need a couple pieces of gear. In addition to the Case Relay which is the heart of the system, you’ll need a dummy battery for your camera. The Relay Camera Coupler goes into your camera battery port and attaches to the Case Relay to power the camera. The coupler is camera specific, so visit the product page on TetherTools.com to find the right one for your camera.

Burning Boat uses two GoPro battery packs in the video, and while any 5V USB battery pack will work, Tether Tools does offer a Rock Solid External Battery Pack which features a 10,000 mAh power capacity, more than 9 times the power of a Sony A7R II camera battery (1020 mAh).

Case Relay Benefits:

  • More cost effective than purchasing multiple proprietary camera batteries
  • Power sources are non-proprietary. Power your camera with the same 5V battery you use to charge phones or tablets.
  • Never need to charge camera batteries again. And never run out power.
  • Compatible with most Canon, Nikon, Sony, Panasonic, Fuji, and Olympus cameras.


We’d like to thank Burning Boat for featuring the Case Relay. Follow them on Instagram, YouTube, Facebook, Twitter, and check them out at www.WhyBurningBoat.com.