Side Post Knife Blade Master Switch 12V 24V Battery Disconnect Cut Off Shut Off for Auto Car RV-Marine Boat Truck Vehicle
Condition: New
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Availability:
In Stock.
Arrives
Tuesday, Sep 29
Style: Side Post
Features
- COMPATIABLEThis knife-blade battery disconnect switch is suitable for SIDE POST TERMINAL, battery Negative post only. Maximum Current: 750A, Rated Current: 250A. 6v 12v 24v car truck, bus, RV, Boat, trailer battery
- TOP LEVEL & HEAVY DUTY This side post battery disconnect switch is made of brass material, corrosion resistance, conductive performance is good, durably made for safety use
- EASY TO INSTALLThis battery doctor knife switch for side post easy to install & simple to use. Switch the knife, then power will cut
- SAVE ELECTRYCITYThis knife blade master switch is used for the battery to isolate and secure the electrical system, eliminate any power draw from the battery when vehicle or boat is not in use, stop unwanted battery drain and prevent theft or unauthorized use.Widely used for car, truck, boat or RV battery, also other electrical equipment's battery
- BUY WITH CONFIDENCE: We are so confident you'll think we have the satisfied battery disconnect switch on the market. If you have any problem about our product, please feel free to give us a message and we will do anything for you to make the thing right. We go out of our way to make sure every customer is happy and satisfied with our product and service.
Description
side post switch
Operation Mode: Off
Current Rating: 200 A
Operating Voltage: 24 volts
Contact Type: Normally Closed
Connector Type: Plug In
Brand: COZYEHOO
Switch Type: Mechanical
Terminal: Blade
Material: Brass
Item dimensions L x W x H: 3.7 x 3.7 x 0.8 inches
Operation Mode: Off
Current Rating: 200 A
Operating Voltage: 24 volts
Contact Type: Normally Closed
Connector Type: Plug In
Switch Type: Mechanical
Terminal: Blade
Circuit Type: direct-current
Mounting Type: Surface Mount
Actuator Type: Hinge Lever
Number of Positions: 2
Upper Temperature Rating: 250 °C
Control Method: Touch
Connectivity Protocol: X-10
Wattage: 6 watts
Compatible with Vehicle Type: Car, Truck, Bus, RV, Boat, Trailer
Control Type: Manual
Compatible Devices: Car, Truck, Bus, RV, Boat, Trailer, Other Electrical Equipment
Item Dimensions: 3.7 x 3.7 x 0.8 inches
Unit Count: 1 Count
Number of Items: 1
Material Type: Brass
Contact Material: Brass
International Protection Rating: IP65
Brand Name: COZYEHOO
Model: sd02
Manufacturer: COZYEHOO
UPC: 616430854368
Item Weight: 0.27 g
Part Number: sd02
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 29
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Style: Side Post
Easy to put on and worked just as described. I didn’t need to use the extra longer screw that was included.
Reviewed in the United States on June 15, 2026 by Placeholder
Style: Side Post
This product worked well on a 1998 Chevy K1500. I was doing several electrical projects on the truck that required disconnecting the battery. I used this knife switch to save time disconnecting and reconnecting the battery. It worked wonderfully for that purpose. The only issue that I had with this product is that the bolt backed out of the battery with some vibration from driving. It was probably because I didn't tighten it down very snugly (No reason to strip the threads on the battery) and it worked its way free. This product would be better if it had the locking tabs like the factory battery connector has. I wouldn't use it for daily use, but it was great to have while I was doing wiring projects. No regrets in buying it.
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Reviewed in the United States on September 19, 2023 by ak_
Style: Side Post
Car batteries have near doubled in cost within 5 years. And the worst thing you can do to a battery is let it drain down to dead. If you have a vehicle that sits a lot, I highly recommend to either disconnect the battery or to take the time to charge it occasionally. That brings me to this product. I've used it twice now, once on a top mount and then this one on a side post mount. Here's my takeaway. The mechanism can be disassembled to arrange either the lever or the battery post mount on either side. This mechanism is fairly big. If you have a top mount, make sure there is ample clearance when closing the hood. Id say a good 2 inches is needed from the top of the battery to the bottom of the hood for this to clear. This side post version doesn't protrude up or out as far as the top post mount version making it slight easier to install and for clearance. I had to free up some length on my negative battery terminals to reach the new location of where it screws to this. It only makes it a few inches further of a reach but it was enough to make my cable too short. Thankfully, the fix was only to only pop off one cable retainer about a foot below the battery terminal. That let me route the battery cable at a slightly different angle and freed up a few inches in length. Things that could be better; The plastic bracket that both the lever and the post mount to is fairly flimsy. It's not a solid piece of plastic as I feel it should be. It's hollowed on the back side. I wouldn't be surprised if it breaks over the course of several years. It definitely could be designed slightly smaller. The allen head bolt and locking nut that act as the hinge pin for the lever was very loose. The nut was a dozen turns away from being tight. This bolt / nut set the tension on the lever arm, tighten accordingly. Each side of this mechanism has a Phillips head bolt that secures the post mount and the lever arm to its plastic bracket ( the one I feel should be a solid piece ) The tread contact points for this connection is dismal. Its the equivalent of threading a machine screw into a thick piece of sheet metal. I would highly recommend adding thread locker to those bolts. All in all, this thing is cheap and it's construction reflects it. Nevertheless, it's cheap insurance and a great tool to help prolong the life of a recreational vehicles battery. Don't hesitate to work with it to make it a little better or fit better for your application. But be gentle to some degree. Others have mentioned they've broken it during install. I could see that but I'd still put that back on them for being too forceful. If you have a vehicle that doesn't get driven much and you have a little bit of mechanic knowhow, give it this a shot. But don't set expectations too high. It works, it does., but yes, it could be better.
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Reviewed in the United States on March 18, 2024 by a.p
Style: Side Post
Straight forward to install (on the negative terminal). This (pictured) version is for battery posts on the side of the battery. The only tool needed was a socket wrench (15mm socket for the included bolts). We use it to prevent phantom battery drain in a vehicle kept at a vacation home that we visit every 3-4 months. Construction of the switch is sturdy and the knife-blade is held very firmly by the receiving clasp when the circuit is closed--it will not open on it's own through vibration/driving. This could be used as an anti-theft deterrent to prevent ignition hot-wiring, but if the would-be thieves opened the hood, they may identify it...of course one could extend the negative run and hide this in a less visible location, but more often then not, they don't take their time when trying to steal vehicles and would likely move on without even opening the hood, so, in my opinion this doubles as a cheap, (reasonably effective, but easy to defeat if found) anti-theft device.
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Reviewed in the United States on August 22, 2022 by Matthew
Style: Side Post
worked great
Reviewed in the United States on August 12, 2026 by Ginger
Style: Side Post
Awesome product I tried others and they are junk this is so simple and easy to hook up
Reviewed in the United States on October 17, 2025 by Mr Fix It
Style: Side Post
Nice. Sturdy. Works great for my chevy pickup
Reviewed in the United States on December 4, 2025 by Daniel J. Richter
Style: Side Post
Works perfectly
Reviewed in the United States on July 17, 2026 by Anthony Ayala