Tether Tools' Case Relay provides continuous power for many DSLR and mirrorless cameras
The Case Relay Camera Power System from Tether Tools offers 'infinite camera power' for most DSLR and mirrorless cameras from Canon, Nikon, Sony and Panasonic. The system works via a DC coupler that plugs into both the camera’s battery port and the Case Relay. The Relay plugs into either a 5V USB external battery or a wall outlet.
Tether Tools says Case Relay, which includes a secondary 1200mAh battery, is a solution for time-lapse photography and other tasks that require uninterrupted, long-lasting power. External battery packs can be swapped without interrupting power, as the Relay's battery will continue to power the camera while the external source is unplugged.
The Relay Camera Coupler is available from $29.99 to $34.99, depending on camera, and the Case Relay is available now for $99.99. Tether Tools also offers an external 5V USB battery for $49.99 USD. Many Nikon and Canon DSLRs are compatible, as well as mirrorless models from Fujifilm, Sony, Olympus and Panasonic. For a full list of compatible cameras check tethertools.com/relay.