100 Amp Removable-Key Battery Disconnect Switch Key benefits Provides a simple, reliable way to isolate a battery or electrical circuit to prevent parasitic drain, allow safe maintenance, and reduce the risk of electrical faults. Handles short-term high current demands with a 500 A surge rating for up to 5 seconds, so it can tolerate starter or transient loads without damage. Includes two removable red keys for secure on/off control and a waterproof cover to protect the switch in wet or dusty environments. What it does Acts as an on/off master disconnect: turn power fully off for storage, transport, servicing, or theft deterrence; turn power on for normal operation. M8 (8 mm) stud electrical connections provide a solid, industry-standard mounting point for battery cables and ring terminals. Performance and compatibility Continuous current rating: 100 amps. Surge rating: 500 amps for 5 seconds. Connection type: M8 (8 mm) studs — compatible with standard battery cable lugs and electrical systems that accept M8 studs. Supplied items: 2 red removable keys and a waterproof cover included in the box. Practical use scenarios Marine: Isolate boat batteries during winter storage or when performing electrical maintenance; waterproof cover helps protect the switch from spray and moisture. RV and camper: Quickly disconnect house or chassis batteries when the vehicle is in storage to prevent drain and extend battery life. Off-grid and backup power: Use as a battery bank master disconnect for solar, inverter, or portable generator systems to safely isolate batteries during service or emergencies. Why choose this switch Clear, mechanical on/off function with removable keys for security and peace of mind. M8 stud connections offer straightforward installation with common cable lugs. Rated for continuous 100 A service with a robust 500 A, 5-second surge capacity to handle transient loads. Box contents 2 red removable keys Waterproof cover