Brass Battery Disconnect Switch 12V/24V – Top Post Master Isolator

Keep your vehicle's electrical system safe and your battery in peak condition with this heavy-duty brass top-post battery disconnect switch. Featuring a large green rotary knob for tool-free operation, this master isolator lets you instantly cut or restore power to your car, truck, SUV, RV, or boat — no wiring required. Made in Mainland China.

Key Features

• Premium Brass Construction: Solid, high-conductivity brass body resists corrosion and ensures stable electrical flow even in demanding environments — far more durable than cheaper zinc-alloy alternatives.
• Quick On/Off Operation: The oversized green rotary knob lets you twist power ON or OFF in seconds — no tools needed. Ideal for cutting power during storage to prevent parasitic drain.
• Universal 12V / 24V Compatibility: Fits most standard top-post battery terminals. Compatible with cars, pickup trucks, SUVs, RVs, boats, and other 12V or 24V DC vehicles.
• Secure Bolt-and-Clamp Design: Heavy-duty clamping mechanism locks firmly onto the battery terminal, eliminating loose connections and ensuring reliable, vibration-resistant performance.
• Anti-Leakage & Electrical Safety: Stops battery self-discharge and electrical leakage, protecting your battery from over-drain and reducing the risk of short circuits or electrical issues during long-term storage or maintenance work.
• Effortless Installation: Directly replaces your existing battery terminal clamp. Secure with the included hardware and you're done — installation takes only minutes with no complex wiring.

Specifications

• Material: Solid brass body + durable plastic knob
• Color: Gold (brass body) + Green (control knob)
• Voltage Compatibility: 12V / 24V DC systems
• Terminal Type: Top-post battery terminal (standard size)
• Function: Battery power isolation, anti-leakage, quick disconnect
• Origin: Made in Mainland China

What's in the Box?

• 1 × Brass Car Battery Disconnect Switch (Terminal Clamp with Green Rotary Knob)

Perfect For

This battery isolator switch is ideal for seasonal vehicle storage, marine applications, off-road builds, fleet vehicles, and DIY electrical maintenance. Whether you're laying up a classic car for the winter, storing a boat, or working on an RV, this switch gives you instant, safe power control at your fingertips.

For more automotive electrical accessories, check out our 10-Pack 24V COB LED Truck Side Marker & Signal Lights and our 1.5M Nylon Braided 3.5mm AUX Audio Cable for Car & Phone.

For guidance on safe vehicle electrical practices, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer safety information.

Learn more: MagSafe (wireless charger)

Frequently Asked Questions

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

A: This battery disconnect switch is compatible with any vehicle using a standard top-post battery terminal operating on a 12V or 24V DC system. This includes cars, pickup trucks, SUVs, RVs, boats, and other automotive or marine applications with a matching terminal size.

Q: Do I need special tools or wiring to install the battery disconnect switch?

A: No special tools or wiring are required. Simply remove your existing battery terminal clamp, slide this switch onto the battery post, and tighten with the included hardware. The entire installation typically takes just a few minutes.

Q: How does the green rotary knob work?

A: The large green knob uses a simple twist mechanism. Turn it to the "ON" position to restore normal battery power to your vehicle, or twist it to the "OFF" position to completely isolate the battery — cutting all power flow and stopping parasitic drain while the vehicle is stored or during electrical maintenance.

Q: Why is brass better than other materials for a battery disconnect switch?

A: Brass offers excellent electrical conductivity and strong resistance to corrosion, making it ideal for battery terminal applications where moisture, heat, and vibration are common. Compared to zinc-alloy switches, a brass construction delivers longer service life and more reliable electrical contact over time.