Case Relay is a Hot Swap System for Non-Stop Power to Your Camera


Tether Tools today unveiled a new product for photographers called the Case Relay. The company says it’s the world’s first system that lets you provide uninterruptible power for a DSLR or mirrorless camera using any standard 5V USB battery pack or a wall outlet.

“This technology provides, for the first time ever, a hot swappable, uninterrupted power source for most DSLR and Mirrorless cameras on the market today,” Tether Tools says. “Stopping video or photo production to remove cameras from stands to change batteries is a challenge of the past.”


The Case Relay is a small box that sits between a Relay Camera Coupler in your camera’s battery compartment and your external battery pack. Since the Case Relay itself holds a 1,200 mAh charge, you can keep your camera constantly ready to shoot while simply changing the battery packs on the other end.


Case Relay is compatible with a large number of Canon, Nikon, Sony, and Panasonic DSLRs and mirrorless cameras, and its power source can be any 5V USB power bank or wall outlet with a USB adapter.

Relay Camera Couplers — the battery-shaped replacement for your camera battery — cost between $30 and $35 depending on which camera model you have. A wire connects the coupler with the Case Relay.



Attach a 10,000 mAh battery pack to the other end of the system, and you’ll have about 3-10 times the power of most individual camera batteries.


“The Case Relay Power System is perfect for time-lapse photography, photo booths, video production, power-hungry LiveView shooting or any long day on the set,” says Tether Tools founder Josh Simons. “To a photographer or filmmaker, Case Relay means you will never run out of power and won’t need to stress about remembering to charge and bring extra camera batteries on every shoot.”

The Case Relay power system costs $100 over on the Tether Tools website, and you’ll need to also pick up the correct Relay Camera Coupler and a suitable external battery pack.

Update on 2/29/16: Atomos got in touch with us to point out their Power Station “has been around for approximately two years and was the first hot swappable, uninterrupted power source for DSLR and mirrorless cameras.”