Here’s a professional specification and overview for the Tether Tools Relay Camera Coupler CRBLH‑1 (for Olympus cameras using the BLH‑1 battery).
Tether Tools Relay Camera Coupler – Olympus BLH‑1 (CRBLH‑1)
What It Is
The CRBLH‑1 is a dummy battery coupler designed to replace the BLH‑1 battery in Olympus cameras. It allows continuous external power via the Tether Tools Relay / Case Relay Camera Power System, so you can shoot longer without swapping out internal batteries. The coupler itself does not store power; it just provides the interface to feed power into the camera from an external source. B&H Photo Video+2Kamera Express+2
Key Specifications
| Spec | Detail |
|---|---|
| Model / SKU | CRBLH‑1 B&H Photo Video+1 |
| Battery Type Replaced | Olympus BLH‑1 battery B&H Photo Video+1 |
| Compatible Camera(s) | Olympus OM‑D E‑M1 Mark II B&H Photo Video+1 |
| Built‑in Coupler Cable Length | ~ 10″ (≈ 25.4 cm) from the dummy battery to the barrel/coax female input connector B&H Photo Video+1 |
| Connector Type | Barrel / coaxial female input to plug into the Relay or external power system B&H Photo Video+1 |
| Power System Required | Case Relay Camera Power System (Relay / ONsite Relay by Tether Tools) — external power banks / AC adapters powering through Relay, not included in the coupler alone. Kamera Express+1 |
How It Works / Use Case
Remove the Olympus camera’s BLH‑1 battery.
Insert the CRBLH‑1 dummy battery into the battery compartment.
Route the built‑in coupler cable through the rubber trapdoor (or designated cable exit) so the battery door can fully close without strain.
Connect the cable to the Relay power system, which is powered by an external 5V source (USB power bank, AC adapter, etc.).
Because the Relay system includes a backup/buffer battery, you can hot swap external power without shutting off the camera. uniquephoto.com+1
Advantages
Enables extended shooting sessions (video, timelapse, long Live View) without worrying about battery changes.
Cost‑effective: fewer spare proprietary batteries needed; you can use common 5V external power sources.
Reliability: the Relay system ensures continuous power even when swapping external sources.
Flexibility: good for studio, field, or long shoots where internal battery life is limiting.
Things to Check / Limitations
The coupler itself has no internal battery — external power must be active (or Relay’s buffer) or camera will lose power.
Proper cable routing is essential: the camera’s battery door must close fully over the dummy battery + cable; if forced open or strained, it may damage the door, cable, or compromise connection.
High power draw (especially video or Live View) means external power source and cable must be adequate to avoid voltage drop or instability.
Compatibility is limited: confirmed for Olympus OM‑D E‑M1 Mark II; check if your camera uses BLH‑1 and has a trapdoor or cable exit to accommodate. B&H Photo Video+1