Car Battery Disconnect Switch 16-17mm | Universal Cut-Off Knob

Universal Car Battery Disconnect Switch — Keep Your Vehicle's Electrical System Secure

Take full control of your vehicle's power with this Universal Car Battery Disconnect Switch. Designed to fit 16–17mm top and negative battery terminals, this rugged knob-style switch lets you instantly cut or restore your vehicle's electrical circuit with a simple turn — no tools required after installation. Perfect for cars, trucks, buses, RVs, boats, and trailers.

Made in Mainland China.

Key Features

• Universal Fitment: Compatible with 16–17mm top and negative terminals found on most cars, trucks, buses, RVs, boats, and trailers. Works with 12V and 24V systems.
• Simple Knob Operation: Unidirectional rotating design makes installation and daily use straightforward — no special technical knowledge needed.
• Prevents Battery Drain: Isolate the battery when your vehicle sits idle to eliminate parasitic power draw and extend battery life.
• Anti-Theft / Power Security: Disconnecting the battery prevents unauthorized use of your vehicle's electrical systems.
• Versatile Use: Can also serve as a manual on/off key for lights, power equipment, and other 12V/24V electrical devices inside or outside your vehicle.
• Durable Construction: Built from a combination of copper contacts and reinforced plastic housing for reliable performance under demanding conditions.

Specifications

• Material: Copper & Plastic
• Terminal Fitment: 16–17mm (universal top and negative)
• Voltage Compatibility: 12V / 24V
• Size: 77 × 65 × 52 mm
• Weight: ~0.1 kg
• Origin: Mainland China

Package Contents

• 1 × Car Battery Disconnect Switch (Knob Type)

Notes

• Product color may vary slightly from images due to monitor brightness and lighting conditions.
• Please allow minor measurement tolerances.

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For more information on vehicle electrical safety and best practices, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Battery charger

Frequently Asked Questions

Q: What vehicles is this car battery disconnect switch compatible with?

A: This universal battery disconnect switch is designed to fit 16–17mm top and negative terminals, making it compatible with a wide range of vehicles including cars, trucks, buses, RVs, boats, and trailers that operate on 12V or 24V electrical systems.

Q: Does this battery cut-off switch require any special tools to install?

A: No special tools are needed after initial installation. The knob-type unidirectional rotating design allows for easy hand-tightening onto your battery terminal. Most users can install it in just a few minutes with minimal technical experience.

Q: How does a battery disconnect switch prevent battery drain?

A: When your vehicle is parked for extended periods, small electrical loads (clocks, alarms, ECU memory) can slowly drain your battery. By turning the disconnect switch to the OFF position, the circuit is fully broken, eliminating all parasitic draw and preserving your battery's charge.

Q: Is this switch suitable for both 12V and 24V systems?

A: Yes, this battery disconnect switch is compatible with both 12V and 24V electrical systems, making it suitable for standard passenger cars as well as larger commercial vehicles, trucks, and marine applications.