Key benefits Extends battery life and prevents parasitic drain with a built-in power shut-off function. Works with a wide range of vehicles, supporting both 12V and 24V systems for cars and trucks. Simple, secure isolation of the negative battery connection for maintenance, storage, or long-term parking. Features and why they matter Direct-fit installation: mounts to the top battery negative terminal with no modifications and no extra battery cables or tabs required. Saves time and reduces installation errors. Robust construction: ABS plastic housing provides durable, safe protection; copper clamps deliver strong conductivity and resist rust and corrosion. Heavy-duty reliability: rugged design maintains stable performance in harsh conditions, suitable for frequent use in commercial and personal vehicles. Compatibility and function Voltage: Supports 12V and 24V systems, making it compatible with most cars and trucks. Function: Manual power shut-off/disconnect at the negative battery terminal to isolate the electrical system instantly. Installation notes Connect directly to the top battery negative terminal; no additional wiring or tabs needed. Insulates and secures the electrical system once installed, helping prevent unintended drain and simplifying service procedures. Practical use scenarios Seasonal storage: Disconnect the battery on a car or truck stored for extended periods to prevent drain and preserve battery health. Fleet and commercial vehicles: Provide quick, reliable isolation for routine maintenance or when vehicles are off duty to reduce battery replacement costs. After-market installs and repairs: Safely isolate the battery during on-vehicle electrical work without removing cables or creating temporary wiring setups. What makes this product stand out Combines a simple, tool-free electrical isolation method with materials and construction designed for long-term, heavy use. Clear compatibility with 12V and 24V systems keeps it versatile for passenger cars and larger trucks. Direct top-negative connection eliminates the need for extra cables while maintaining good conductivity and corrosion resistance.