Side Post Battery Disconnect Switch 12V Battery Isolator Cut Off Kill Switch Shut Off Master Quick Disconnect for Car Truck GM Chevy Marine Boat RV ATV Anti Corrosion Washers 125A by AUTOMAJOR

The AUTOMAJOR Side Post Battery Disconnect Switch is a heavy-duty cut-off switch that installs directly on the side terminal of GM-style batteries — providing instant battery isolation with the twist of a knob. No more dead batteries from parasitic drain, no more disconnecting battery cables for storage, and no more theft worries. Just twist the knob to disconnect, twist back to reconnect. Specifications: rated for 12V automotive systems with continuous current up to 125 amps and surge current up to 500 amps for engine starting. Fits standard GM-style side terminal car batteries with 3/8 inch (M10) threaded side terminal post. Compatible with virtually all standard automotive 12V batteries with side terminals from major manufacturers including AC Delco, Interstate, DieHard, EverStart, Duralast, NAPA, AutoZone, and Costco brands. The disconnect switch installs in seconds with no wiring, no cutting, and no soldering — simply remove the existing positive battery cable bolt from the battery side terminal, attach the AUTOMAJOR disconnect switch to the positive battery side post, and reconnect the cable to the side of the disconnect switch. The included anti-corrosion washers help maintain conductivity at the battery connection points. Common applications include: vehicles in long-term storage (winter cars, classic cars, RVs, boats), reducing parasitic drain from modern electronics that draw current even when the vehicle is off, theft deterrent (turn off the switch when parked overnight), emergency battery shutoff during electrical work or repairs, marine applications (boats stored on trailers or at docks), motorhomes and RVs (reducing drain when parked between trips), tractors and agricultural equipment, and ATVs/UTVs/snowmobiles in seasonal storage. The switch features a green/red color-coded knob that clearly shows the current state — green for connected (battery on), red for disconnected (battery off). The high-conductivity copper internal contacts handle continuous loads up to 125 amps without overheating, and the 500 amp surge rating handles engine cranking current. The corrosion-resistant housing handles moisture, road salt, and engine bay heat for long-term reliability. Important: this is a 12V system disconnect switch designed for SIDE POST (GM-style) batteries with M10 threaded side terminals. Not for top post batteries (use a top post style switch instead). Not rated for 24V truck systems, marine high-amperage primary disconnects (use a 200A+ marine switch instead), or any system above 125A continuous current. Side terminal batteries are most commonly found on GM vehicles — Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Hummer, and Oldsmobile — but also on some Chrysler, Dodge, and aftermarket battery applications. If your battery has bolt-on cables that thread INTO the side of the battery (rather than clamping over the top of the battery posts), this is the correct switch for you. Backed by AUTOMAJOR — trusted electrical components for automotive, marine, RV, and powersport applications.

• Side post battery disconnect switch installs directly on the side terminal of GM-style batteries — twist the knob to disconnect, twist back to reconnect. No wiring, no cutting, no soldering required. Installs in 30 seconds with basic hand tools. Color-coded knob (green/red) shows current state at a glance.
• Specifications: 12V automotive system, 125 amps continuous current, 500 amps surge for engine starting. Fits standard GM-style side terminal batteries with 3/8 inch (M10) threaded side terminal post. Compatible with AC Delco, Interstate, DieHard, EverStart, Duralast, NAPA, AutoZone, and Costco side terminal batteries.
• Reduces parasitic drain that kills batteries on stored vehicles. Modern cars draw current even when off — keeping ECUs awake, security systems active, and clocks running. A few weeks of parked storage can drain the battery to dead. The disconnect switch isolates the battery completely, keeping it fully charged for months. Useful for winter storage, classic cars, seasonal vehicles, and rarely-driven backup vehicles.
• Theft deterrent: turn the switch off when you park overnight or leave the vehicle for extended periods. Most modern vehicle theft requires functional electronics — without battery power, the ignition will not crank and the vehicle is much harder to start. Cheap insurance for parked vehicles.
• Important: designed for SIDE POST (GM-style) batteries with M10 threaded side terminals — NOT for top post batteries. Side terminal batteries are most commonly found on GM vehicles (Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Hummer, Oldsmobile). If your battery has bolt-on cables that thread INTO the side of the battery, this is the correct switch. Not for 24V truck systems or marine high-amperage primary disconnects.