Spark Proof, Waterproof and Flame Retardant.Built with flame retardant battery switch housing, this unit ensures enhanced safety by reducing fire hazards. The spark proof battery switch design minimizes ignition risks, while its waterproof battery isolator construction provides durability in marine and outdoor environments. Wide Compatibility for Various Applications.Compatible with marine battery terminal switch systems, RV battery isolator systems, solar power systems, and off-grid battery setups, this battery drain prevention switch can be used alone or in combination with other electrical circuits. Ideal for cars, trucks, ATVs, trailers, and emergency power cutoff devices Quick and Direct Installation.This direct connect battery switch attaches to negative post battery terminals 15.5-17mm without extra cables or lugs, simplifying the installation process. The top post battery disconnect design allows for quick battery disconnection, preventing power drain when vehicles, boats, or RVs are not in use Heavy Duty 12-48V Battery Disconnect Switch.Designed for DC 12V-48V battery systems, this heavy duty battery cutoff switch ensures safe power isolation with ON and OFF positions. It supports continuous 275A at 12V, withstands intermittent 455A, and handles a transient peak of 1250A, making it an ideal high current battery isolator for demanding applications Protect Your Battery and Extend Its Lifespan.This high conductivity battery disconnect switch effectively prevents battery drain and eliminates parasitic power loss, helping to extend battery lifespan. It provides a secure emergency power cutoff to protect your vehicle, boat, or RVs electrical system. Always switch to OFF before disconnecting to avoid damage to the battery or switch.