Tether Tools Case Relay DC Power Extension Cable (6.6′ / 2.0 m) — “CRDCEXT”
What It Is
A DC (direct current) extension cable intended for use with the Case Relay Camera Power System. It lets you place the Relay power module (or a USB battery bank feeding the Relay system) further away from the camera, which is especially useful in reducing tripod/camera shake when swapping batteries and improving rig flexibility.
Key Features & Specs
| Specification | Detail |
|---|---|
| Length | ~ 6.6 feet (≈ 2.0 meters). Adorama+2Design Info+2 |
| Connectors | ⋅ One end: 2.1 mm × 5.5 mm male plug ⋅ Other end: 2.1 mm × 5.5 mm female connector. Adorama+2PROCAM Photo & Video Gear+2 |
| Cable Construction | Designed for reliable, continuous power delivery; durable build to match the Case Relay system. (Exact wire gauge not widely published) Adorama+2PROCAM Photo & Video Gear+2 |
| Weight / Packaging Dimensions | Packaging weight is small; box dimensions are modest. Exact weight of just the cable isn’t broadly specified. Design Info+1 |
Use‑Cases & Benefits
Extended Reach: Allows the battery or power source to be positioned away from camera & tripod—useful for lighting setups, external mounting, or where the power pack might obstruct movement. Adorama+2PROCAM Photo & Video Gear+2
Reduced Shake & Vibration: By keeping the power pack away or at rest, you avoid tugging or movement when swapping batteries, which is especially important for long exposure, time‑lapse, or delicate setups. tethertools.ca+2Adorama+2
More Flexible Mounting Options: Useful in rigs where mounting the Case Relay or battery directly adjacent to the camera is inconvenient or would interfere with other gear. Gives more freedom in cable routing. Adorama+1
Limitations / Things to Keep in Mind
Voltage Drop / Cable Gauge: Longer DC cables can suffer from voltage drop. If the cable gauge is not large enough (i.e., the thickness of the inner conductor too small), the camera may receive slightly less voltage/current, especially under high draw. The product’s specs don’t clearly state gauge, so testing with your setup is advisable.
Cable Management: Extra length introduces potential for snagging, tangles, or drag. Needs to be secured properly in rigs or when moving.
Wear & Connector Stress: Moving parts or frequent connection/disconnection stresses connectors. Ensure connectors are handled carefully; strain relief where possible.
Compatibility: The connectors (2.1 × 5.5 mm) must match both the power source & the device being powered. Make sure the Case Relay in your camera setup accepts that standard.
Practical Tips
Use with power sources that provide stable current and voltage, high enough for your camera’s draw (especially in live‑view or video mode).
Keep the cable slack managed—use clamps or cable ties to prevent pull on connectors.
Regularly inspect connectors for any looseness or wear. Replace if you see frayed insulation or poor fit.
If using in cold or harsh environments, test before serious shoots to ensure the extension length and cable performance hold up.
If you like, I can prepare a version of this for marketing (web page / product listing) or compare this extension cable to other similar options so you can see what trade‑offs others make.
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