Ampper Side Post Battery Disconnect Switch 12V 24V, Knife Blade Battery Switch Disconnect Power Cut Shut Off for Car Boat RV ATV (with Long Bolt)

High quality and works as intended! Comes already greased. Put it on my 1970 camaro for piece of mind and easy kill for storage. Doesnt look to out of place. Came with bolts too! Recommend using it for anything you have a drain on or something older are worried about electrical fires with. This is a post mount so make sure you have the right battery design first.

Cast copper cable attachment points. Copper knife is the switch. Function and durability appear to be in my future. Looks are unimportant. The low profile aids in fitment. Easy to install. It should extend battery life.

awesome item , easy to install , when you install the negative post wire to the on , off, you don't want to arc blade first ., installing the positive post wire . some batteries ,are cramped ,in the engine ,compartment. be careful not to touch the other post ,you just installed . you don't want ,to arc ,the wires, when installing . it's good for the battery , to put the blade ,in the off position , if you don't drive it a lot . tsk. for reading ,this review .

I have an older Chevy pickup that is only used occasionally. To protect the battery, I wanted to be able to disconnect it when not in use, as it should hold a charge longer. My truck has the crappy side post battery terminals, so I had to find something that would hopefully fit. There is very little space on the side of the battery (less than 2 inches between the battery and the air filter box), so this switch is an extremely tight fit. I was actually a little surprised at just how large this switch is. Makes sense though considering how much current has to pass through it. I thought about the switches with the round dial, but they were all too fat to fit in the space. This was really my only option. The instructions tell you to install this on the negative terminal of the battery. I had a horrible time trying to do so, as it is designed for the hinged side of the switch to go on the battery, and the open side to the cable. The cables in my truck were nowhere long enough to accomplish this. They just wouldn't reach. I took a chance and installed the switch the other way - hinge side to cable and open side to battery. Even with this, I tore my hands up badly getting this installed. I had cuts and scrapes all over the back of my hands. To install the switch this way, you have to attach the cable with a nut. The switch has a smooth pass-through on the hinge side, but it is designed with screw threads on the open side. This it to allow you to pass the bolt through to the battery, while being able to screw the cable directly to the switch. It took some time and effort, but I was able to get it installed. However, I'm not confident it will stay in place and not vibrate loose. So far, with just one short trip, it worked fine. I was also worried there would not be enough room under the hood with the switch in the upright (disconnected) position. If left at 90 degrees, the hood would hit it when closed. The pictures don't show it, but you can actually rotate the knife a full 180 degrees so it lays flat. In that position, there is enough room to close the hood without hitting it. The main problem (other than the cable being too short), is with the switch in place, you can't access the mounting bolts under the switch to tighten them. You literally can't get to them. The switch blocks the bolt heads. I had to tilt the switch to the side to tighten, but every time I rotated the switch upright, it loosened again. I had to use a ratcheting wrench and tighten tiny bits at a time (literally one ratchet at a time). I must have cranked that wrench a hundred times before it got tight. Installation was a nightmare, and it took a good 3 hours before I was satisfied it was stable. I sent a message to the seller, and they said it was OK to install it like I did, just make sure everything was tight. I also asked if it was possible to install it on the positive battery terminal instead, as it would be easier to do so in my situation. They said in cases where space is tight, it is OK to install on the positive side. I plan to move the switch to the positive side as soon as we have a warmer day. Even so, I will still have to install the switch "backwards" as I will have the same problem with cables being too short. At least I will be able to have better access in this position. I also intend to use nylon (airplane) insert nuts to keep things from vibrating loose. The only other concern I have is will the knife stay in place with vibration and bumpy roads. I think it will, but I may look at finding a Velcro strap I can wrap around it when in use to prevent it from coming loose. I still gave this switch 4 stars even though the installation was horrible. However, not everyone will have the same problems I did unless you have a 4th generation C/K Chevy truck. If you do, good luck! If not, you may have an easier time than I did. The switch does function as it is designed to do - disconnect the battery with a simple pull of the lever, so that's why I rated it as I did. Worth the price.

I have a vehicle that doesn't get driven much and I've toasted more than one battery because the vehicle has some slow current drain that I haven't been able to track down. I've tried other battery cut off switches, but they were clumsy and ineffective and in some cases just didn't work. This shut off is so simple. When I first saw it, I couldn't imagine why anyone would use anything else. It's pretty large, but it's made to accommodate a lot of amps, so you want large, heavy, copper. You want this. No installation required, per se. No drilling, no screws. Just disconnect you battery terminal. Set this on top of the battery and then connect your battery terminal to the other end. Under 5 minutes. The only caveat is: It is pretty big compared to some other devices, so make sure you have room to install and use it. You can modify the installation to have the knife swing up or to the side, so you have some flexibility there. If you have the room, this is the perfect solution.

I have bought several the these. Make sure you understand what side, positive or negative terminal you want these on and your clearance to operate the switch, some work sideways and some are up and down. I have two on my 1991 motor home, one for the starter battery and one for the two six volt system. I no longer have to worry about a ghost discharge. I have one on my sons 79 Camaro and one on his father in-laws show car. These were installed about six months ago, no problem. They look like they would be easy to clean if corrosion creeps in, time will tell. I see that some people have had problems with them breaking as they are installed around the battery post. To avoid this, IF your switch fits loose on the battery post, get a "Battery Terminal Post Adaptors Positive or Negative Sleeves" from you local auto store to fill in the gap

Simple, made well, and fair price.

I tried and returned three different styles of side mount battery cable disconnects. I own a 1999 Chevy Suburban and none of this disconnects would fit in the space I had, or they needed to be modified to fit. Except for having to remove the air cleaner assembly the Anpper Side Post Disconnect fit perfectly. I truly recommend this product.