Case Relay Coupler Bundle

Case Relay Camera Power System (CPS) lets you power your camera continually with an external battery pack or wall power, providing peace of mind knowing you have an uninterrupted power source for your camera.

$ 129.98$ 144.98

Select Your Camera

Relay Camera Coupler


Uninterruptible Power for Your Camera

With Case Relay, you’ll never run out of power and never need to stress about forgetting your camera batteries. If you’re shooting and get low on battery power, simply swap out external batteries throughout your shoot. Case Relay’s internal UPS battery will keep your camera powered while you exchange external batteries. Utilizing a wall outlet or external batteries, you could in theory shoot forever with consistent power flowing to your camera through Case Relay.

How does it work?

A graphic depicting how the Case Relay works

Simply insert the Relay Camera Coupler directly into the camera battery port, attach it to the Case Relay CPS and power your camera with the included 10,000mAh Rock Solid External Battery Pack or an AC power source, such as a wall outlet or generator using the included Rock Solid Dual USB to AC Wall Adapter. Because Relay also has its own secondary internal 1200 mAh battery, if your external battery runs low you can easily hot swap the external battery and not lose power to the camera.

Case Relay is compatible currently with many Canon, Nikon, Sony, Panasonic, Fuji, Olympus, and Black Magic cameras and can be powered by any 5V USB power bank any 2.1+A USB Wall Adapter or any Dtap (VMount) battery system.  It can also power any monitors and accessories that use the Sony NPFL Series batteries.

Key Features:

  • The Case Relay Camera Power System contains a 1,200 mAh battery, smaller than a traditional camera battery but enough power so you can swap out power sources mid-shoot and maintain 100% uptime.
  • The Case Relay Coupler is designed to replace your camera battery and is not considered an after-market battery, just containing wiring. The Coupler cabling runs out the rubber trap door on your camera battery compartment or battery grip, and connects to the Case Relay Camera Power System unit.
  • The Rock Solid External Battery Pack (10,000 mAh) packs a punch, providing 3 to 10 times the power of most camera batteries, depending on the camera.
  • In lieu of using a 5V USB external battery pack, you can attach a USB cable to the Case Relay and run it to the included Rock Solid Dual USB to AC Wall Adapter plugged into the wall. The USB cable acts as an extension cord and powers the Case Relay. Alternatively, you could plug the Case Relay Coupler into a Rock Solid USB to AC Wall Adapter, then a power extension cord of necessary length. This is an ideal setup for studio photographers and photo booths.

Case Relay Camera Power System (CPS) lets you power your camera continually with an external battery pack or wall power (sold separately), providing peace of mind knowing you have an uninterrupted power source for your camera.

What’s included:

Case Relay Camera Power System
Relay Camera Coupler

“We do Dog Show Event photography. The Case Relay attached to the 10000mh battery powers the D750 that is tethered to our laptop. Before I got it we would go thru about 5 or 6 Nikon batteries in a day long assignment.
– B. Kurtis, Tether Tools Customer

Suggested Uses:

  • Case Relay is ideal for time-lapse photography, astro-photography, or any photography that requires extended shooting time such as nature, fashion, landscape, architecture and more.
  • Case Relay is ideal for video production as you can swap the External Battery Bank, without having to stop shooting to change camera batteries.
  • Use it to power Photobooths to ensure consistent uptime throughout an event.

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“It’s perfect to power my second Sony A7S II camera during weddings. Because I’m not with eyes on the camera most of the time, it allows me to connect any power pack. The most important thing is to allow swapping power banks without loss of power and corrupted files.”
– P. Portela, Tether Tools Customer

Case Relay attached to a tripod in the foreground and a majestic waterfall in the background

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“I’ve used it to shoot a three months time lapse!!!!!!! It was a place without electric power so it has been super useful!!!!!!!”
– D. Pepe, Tether Tools Customer

Product Specifications:

Case Relay Camera Power System

Relay Coupler

  • Relay Coupler is simply an insert for your camera battery cavity that enables powering the camera via Case Relay Camera Power System. The coupler does not contain a battery or hold a charge.

What is the Proper Way to Connect the Case Relay? Here’s the Recommended Connection Sequence:

  1. Keeping the cables unconnected, insert Relay Camera Coupler into camera, completely close door.
  2. Connect the Case Relay to the power source.
  3. Connect the Relay Camera Coupler to the Case Relay

More questions about the Case Relay? Check out our FAQ and instructions page.

Includes Tether Tools Limited 90 Day Warranty
Product Instructions

Return Policy

Find Your Case Relay Camera Coupler

Case Relay Camera Couplers from Tether Tools work in tandem with the Case Relay Camera Power System (CPS) to keep your camera powered continually with an external 5V USB battery pack or wall power.

What’s Included: