- Battery Meter Switch for Negative Pole: Designed for battery diameters of 15-17 mm, this switch is compatible with 12 V and 24 V car batteries, making it ideal for cars, vehicles, RVs, ATVs, and boats. - Main Switch Functionality: Prevents unnecessary battery drain in your vehicle and allows for safe temporary power disconnection during maintenance, ensuring your battery remains in optimal condition. - Durable Material: Constructed from electroplated brass, this car battery power switch offers exceptional corrosion resistance and conductivity. It supports a maximum current of 800A with a rated current of 150A, ensuring reliable performance. - Easy Power Interruption: Simply lift the knife to disconnect the power supply. This feature not only simplifies your workflow but also protects against short circuits and potential fires when working on electrical systems. Use Scenarios: 1. Ideal for RV owners needing to disconnect their battery during long-term storage to prevent drain. 2. Perfect for boat enthusiasts who require a reliable method to cut power while performing maintenance. 3. Essential for automotive technicians who need a safe way to power down batteries while servicing vehicles. This product combines functionality, durability, and ease of use, making it a must-have for anyone working with car batteries.