Quick answer
A DC coupler lets you run your camera from a wall outlet instead of draining batteries. Choose one that matches your camera's battery type and consider whether you need a standalone AC adapter or a tether-system coupler.
Why use a DC coupler?
If you shoot in a studio, do product photography, or livestream for hours, swapping batteries is a hassle. A DC coupler replaces the battery with a dummy unit that connects to an AC adapter, giving you continuous power. The trade-off is that you lose portability — you're tethered to an outlet.
What to check before buying
First, confirm your camera's battery model. Each coupler is designed for a specific battery type (e.g., Sony NP-FZ100, Nikon EN-EL15). Using the wrong one won't fit or could damage the camera. Second, decide if you want a standalone AC adapter or a coupler that integrates with a tether system like the Case Relay System from Tether Tools.
How to choose a DC coupler
- Match your battery type: Look up your camera's battery model number (e.g., NP-FZ100, EN-EL15, DMW-BLC12, or LP-E17). Buy a coupler explicitly made for that battery. Write down your battery model before shopping.
- Choose between standalone or system coupler: Standalone couplers like the Promaster models include an AC adapter and work right out of the box. System couplers like the Tether Tools Relay require a separate power source (e.g., the Case Relay System) but offer flexibility across multiple camera bodies. If you only need one camera powered, a standalone coupler is simpler and cheaper.
- Consider build quality and cable length: Check that the coupler's cable is long enough for your setup. Some couplers come with short cables; you may need an extension. Also, look for reinforced strain relief at the connector to prevent damage over time. Measure the distance from your camera to the nearest outlet.
Product facts
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Promaster DC Coupler with AC Power Supply for Sony NP-FZ100: The Promaster DC Coupler with AC Power Supply is designed for Sony cameras that use the NP-FZ100 battery. If you own a Sony camera with that battery, this coupler gives you a complete AC power solution in one package — no separate adapter to buy.
Promaster DC Coupler with AC Power Supply for Sony NP-FZ100
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Tether Tools Relay Camera Coupler for Panasonic Lumix Cameras with DMW-BLC12 Battery: The Tether Tools Relay Camera Coupler takes the place of the DMW-BLC12-type battery pack and provides a connection to the Case Relay System for long-term continuous operation. This is ideal if you already use or plan to use the Case Relay System, because you can swap couplers across different camera systems without changing your power infrastructure.
Tether Tools Relay Camera Coupler for Panasonic Lumix Cameras with DMW-BLC12 Battery
Who should buy a DC coupler?
Best for
- Studio photographers who shoot tethered for hours
- Content creators who livestream or record long videos
- Anyone who wants to save rechargeable battery cycles
Not for
- Event or travel photographers who need full mobility
- Users who want a universal coupler that works across different battery types without an adapter
