CMRDQD 250A 12V Remote Battery Disconnect Switch with LED Voltage Display — 2 Remotes, Negative-Terminal Mount

CMRDQD 250A 12V Remote Battery Disconnect Switch is a remote-controlled kill switch with a real-time LED voltage readout designed to protect 12V batteries and prevent parasitic drain.

This compact negative-terminal battery disconnect gives you remote control over your vehicle's electrical feed while showing live battery voltage. Built to fit many 12V gasoline vehicles and recreational platforms, the unit uses a magnetic relay rated for 250 amps to interrupt the main negative circuit safely. It includes two remotes, mounting hardware, and two copper connection bars so you can position it vertically or horizontally on the battery post or terminal block.

How does the voltage display help manage battery health?

The bright LED readout continuously shows the battery’s voltage so you can judge charge state at a glance. The switch automatically cuts power if voltage remains below a safety threshold to avoid deep discharge, and it disables remote shutdown while charging to prevent accidental cutouts.

• Real-time LED voltage monitoring
• Automatic power cutoff after sustained low-voltage event
• Remote disable above charging voltage to avoid shutdown during charge
• Clear numeric readout for quick diagnostics

Will this work on my vehicle or boat?

Designed for broad 12V compatibility, the CMRDQD switch fits most gasoline cars, light trucks, ATVs, UTVs, small boats, trailers, RVs and motorcycles with batteries under about 4.0L. Confirm terminal clearance and physical dimensions before installing.

• Works with standard 12V lead-acid systems
• Accepts 9–13 mm and 15–17 mm negative terminals
• Compact footprint: approximately 3.3 × 2.4 × 1.4 inches
• Suitable for vehicles and recreational gear with up to 250A load needs

How does installation and mounting work?

The device installs on the negative side of the battery using two included copper bars and mounting tools. It supports vertical or horizontal mounting to fit a variety of battery layouts, and the package includes two push-button remotes so you can cut power from a short distance.

• Negative-terminal installation for safety and compatibility
• Two copper connection bars for flexible orientation
• Two simple tools included to speed setup
• Follow product images and instructions; disconnect power before starting

What safety and operational limits should I know?

The internal magnetic relay is rated for continuous 250A and is intended to interrupt typical vehicle loads but not designed as a primary fuse. The unit disables remote shutdown when the sensed voltage indicates charging, reducing the chance of cutting power while driving or when alternator output is present.

• 250A relay rating for heavy accessory loads
• Remote control locked out above the high-voltage threshold
• Automatic 120-second delay before low-voltage shutdown to avoid nuisance trips
• Not a replacement for properly sized system fuses and circuit protection

Who this is for: The CMRDQD 250A 12V remote battery disconnect is suited for vehicle owners, boaters, RVers and powersports enthusiasts who want simple, remote battery isolation, easy voltage monitoring, and theft/theft-deterrent functionality. It’s especially helpful for owners who park long-term, have aging batteries or add aftermarket electronics, and for anyone who needs a compact, mountable solution that fits a wide range of 12V systems. Always check terminal dimensions and battery layout before purchase and follow safe installation practices.