- Battery Meter Switch for Negative Pole: Designed to fit battery negative terminals with diameters of 15-17 mm, compatible with 12 V and 24 V car batteries. Ideal for use in cars, vehicles, RVs, ATVs, and boats. - Main Battery Switch: Effectively prevents battery drain by disconnecting power during vehicle maintenance or when the vehicle is not in use. - Durable Construction: Made from high-quality brass with an electroplated surface for enhanced corrosion resistance and excellent conductivity. Supports a maximum current of 800A and a rated current of 150A. - Easy Operation: Simply lift the knife switch to interrupt power. This feature helps prevent short circuits and potential fires while working on electrical systems. Use Scenarios: 1. Ideal for disconnecting your RV battery when parked for extended periods, ensuring no power is wasted. 2. Perfect for ATV owners who need to quickly cut power during maintenance or repairs. 3. Essential for boaters looking to protect their battery and electrical systems from accidental drain during storage. This battery meter switch combines functionality, compatibility, and safety, making it a reliable choice for all your battery management needs.