Here’s a detailed overview of the Tether Tools Relay Camera Coupler – Nikon Battery EN‑EL24 (Model CRN5C):
What It Is
The CRN5C is a dummy‑battery coupler designed to replace the Nikon EN‑EL24 battery in compatible camera models. It works with the Tether Tools Case Relay (or ONsite Relay) Camera Power System to allow your camera to be powered continuously via external power sources (USB power banks, AC adapters, etc.), rather than relying on the internal battery. The coupler itself does not contain a battery—it simply routes power into the camera’s battery compartment.
Key Specifications
| Spec | Details |
|---|---|
| Model / SKU | CRN5C (Relay Camera Coupler for Nikon EN‑EL24) Polyline Corp+3Tether Tools+3B&H Photo Video+3 |
| Battery Type Replaced | Nikon EN‑EL24 Tether Tools+2Polyline Corp+2 |
| Camera Models Compatible | Nikon 1 AW1; Nikon 1 J1, J2, J3; Nikon 1 S1; also “DL24‑500 f/2.8‑5.6” Tether Tools+2rubbermonkey.com.au+2 |
| Coupler Cable Length | ~ 10 in / 25.4 cm from battery compartment to the female barrel input rubbermonkey.com.au+3Design Info+3Filmtools+3 |
| Total Cable Run (with Relay system) | ~ 50 in / 127 cm when combined with the Relay power cable system Tether Tools+2Tether Tools+2 |
How It Works & What It Enables
Insert the CRN5C coupler into the camera’s EN‑EL24 battery socket.
Route the coupler’s cable through the camera’s rubber trapdoor or cable exit so the battery door can close properly. Polyline Corp+2B&H Photo Video+2
Attach the coupler to the Case Relay / ONsite Relay power system, which is powered by an external 5V power source (power bank / AC adapter etc.). Tether Tools+1
Because the Relay system includes a built‑in buffer (internal battery), you can swap external power without interrupting camera operation. Tether Tools
Advantages
Enables extended shooting sessions, time‑lapse, or video work without needing to switch out batteries.
More flexible power sourcing: external USB or AC power is often easier to manage than carry multiple proprietary batteries.
Hot‑swap capability means less downtime during shoots.
Cost efficiency over time for users who frequently shoot long sessions.
Things to Watch Out For / Limitations
The coupler has no battery of its own. If external power fails and the buffer is depleted, the camera will lose power.
Battery door must seal properly; ensure the cable exit is routed correctly and that the door closes without strain.
Compatibility: Only works with cameras that accept EN‑EL24 batteries. Even among those, camera firmware, door design, or trapdoor features matter. Always double‑check your camera model. Tether Tools+2Design Info+2
Power draw: In LiveView or video modes, power consumption rises—external source and cabling must handle the load.
Cable stress: Avoid sharp bends, tugging; provide strain relief to prevent damage over time.
If you like, I can write up a polished product page copy for the CRN5C, or compare this EN‑EL24 coupler versus a couple of others (say EN‑EL15 or EN‑EL18) so you can see which suits your gear best.