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Tether Tools Relay Camera Coupler — Canon LP‑E8 (CRCE8)
What It Is
The CRCE8 is a dummy battery coupler made by Tether Tools. It replaces the LP‑E8 battery in compatible Canon EOS cameras, allowing those cameras to be powered continuously via an external power source when used together with the Tether Tools Case Relay Camera Power System. The coupler itself does not contain a battery — its job is to provide a constant electrical path from an external source to the camera’s battery contacts.
Compatible Cameras
Cameras that originally use the Canon LP‑E8 battery are compatible. Some of these include:
Canon EOS Rebel T5i
Canon EOS Rebel T4i
Canon EOS Rebel T3i
Canon EOS Rebel T2i B&H Photo Video+2Polyline+2
Always double‑check your model to ensure it uses LP‑E8 before buying. B&H Photo Video+1
Key Technical Specifications
| Spec | Detail |
|---|---|
| Model | CRCE8 B&H Photo Video+2Polyline+2 |
| Battery Type Replaced | LP‑E8 Tether Tools+2B&H Photo Video+2 |
| Coupler‑to‑relay cable length | ~ 10″ (≈ 25.4 cm) built‑in cable from coupler to its barrel input port. B&H Photo Video+1 |
| Total cable run with Relay system | ~ 50″ (≈ 127 cm) when the coupler is connected via the Relay Camera Power System cable. Tether Tools+2Polyline+2 |
| Input / Connection Type | The coupler has a barrel / coaxial female input (to plug into the Case Relay or ONsite Relay power system) B&H Photo Video+1 |
| Warranty | Limited 90‑day manufacturer’s warranty Tanotis+1 |
How It Works
Insert the CRCE8 dummy battery into the camera’s LP‑E8 battery compartment.
Ensure the battery door can close properly; route the coupler cable through the rubber trap door (or cable exit) if your camera has one. This is important for safety, fit, and preventing stress on the door or cable. Polyline+1
Connect to the Relay system (Case Relay / ONsite Relay), which provides power from external sources (USB power bank, AC adapter, etc.). The Relay system often has its own buffer (internal backup battery) so you can swap external power without the camera shutting off. Tether Tools+1
Advantages / What It Enables
Continuous shooting / long‑duration use without needing to change internal LP‑E8 batteries. Useful for video, timelapse, long sessions in studios or outdoors.
Hot‑swap capability: Because the Relay power systems usually have an internal battery buffer, you can switch external power sources (power banks, for example) without interrupting camera operation. Tether Tools+1
Cost savings and convenience: Less need to carry multiple LP‑E8 batteries. External power sources tend to be cheaper and more versatile.
Flexibility: With a universal power cable / coupler, the system can work across camera systems if you have multiple couplers, making modular use easier.
Limitations & Things to Check
No internal storage: The CRCE8 does not itself store power, so complete reliance on external source (unless the external system provides a buffer). If external power fails and there’s no backup, camera will shut off.
Battery door and cable routing: If the door can’t fully close or the cable has to be forced, that can stress the connector or door hinge. Proper routing via trapdoor or flexible exit is essential.
Power demands under load: In high draw modes (long Live View, video recording, etc.), current/voltage drop may be more significant. Use a good quality external power bank or adapter and good cabling to avoid instability.
Compatibility checks: Confirm your specific Canon model matches LP‑E8 battery spec and that there are no case variations that prevent fit.
Environmental / physical wear: The cable, connector, and dummy battery contacts can degrade over time, especially with movement, moisture, or repeated plug/removal. Use strain relief, gentle movements, keep connections clean.
If you want, I can write you a polished product description / marketing copy for this CRCE8 coupler (LP‑E8), or compare it side‑by‑side with LP‑E6 or LP‑E10 variants to help decide which fits your gear best.ffortless customization. With professional themes and an intuitive system, you can design with ease and precision, ensuring a polished, responsive result.
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