Remote Battery Disconnect Switch 12v, 250A, Upgrade Prevent Battery Drain, Disconnect Negative Car Kill Switch Anti-Theft, Remote Battery Kill Switch for Car, Truck, RV

So here are pictures of the manual with some details and diagrams of what I am talking about. Would be nice if that was in the product description.So if you are an engineer like me this 2 wire cut-off will work on the positive post instead of the negative post for use as a shut-off.In my truck, my negative post is almost impossible to connect to and also I run dual batteries using an auto-isolation circuit so this needed to be set on the positive side of my battery to prevent discharge through the positive cable as the ground is shared between both batteries and the auto-switch is on the positive side and would require a major rewire job.So before you connect anything under the hood this is what you need to do with 86 and 85 the POWER POINTS for the electronics. The connectors for the batter on the outermost of the relay are NOT polarity sensitive so do not care if it is positive or negative or what direction the power is flowing.YOU MUST CHANGE THIS BEFORE YOU CONNECT ANYTHiNG TO USE THIS ON THE POSITIVE POSTWhat the manufacturer did is they tapped the negative 85 using a short wire to the negative post for the circuit side then using a longer wire run 86 to the positive battery post.Then the relay when switched on connects the out port to the negative battery cable for the body ground.As this is ACTUALLY a 2-wire cut-off relay and THOSE 2 wires on 85 and 86 are what MATTER as to how they connect to power, the manufacturer just uses a short cable to the BATTERY SIDE of the cut-off part of the relay and that is what makes it polarity sensitive for negative side use.BUTwhat you can actually do is connect the relay to the positive post and the output to feed to the rest of the vehicle. the CENTER posts are the ones that you CAN NOT misconnect.To use this on the positive side instead do the following.REVERSE the black and red wires on the center 2(two) connections (85- 86+) so that the negative side 85- is connected to the long red wire that connects to the negative battery post and the positive side 86+ becomes the black short wire that connects to the positive post of the battery.A relay is a Relay or a basic switch that is opened and closed by a magnetic coil being energized and in itself the contacts are not polarity sensitive.It is the electronic circuit on the CENTER post which IS POLARIZED!!!Doing the above or even eliminating the manufacturer cables and electing to use longer red and black cables to provide power to the 85 and 86 on the relay to the correct terminals will allow this to work on the positive side of the battery.Not all installations can use the negative side of the battery in my case I need to be able to cut off the positive side due to the DUAL battery system and shared negative connection.If this is reposted I will add photos of my configuration when the sun comes out as the Delivery was late at night and there was not a lot of light and I have been dealing with the power drain problem for some time and disconnecting and reconnecting my battery using a jump box. In my truck someone tried to jimmy the door locks so instead of replacing them I added power locks and an RFID pad to unlock the doors, there is no other way as there is not a working key lock, it has to be the RFID pad or using the power locks relay via the wireless door lock remote. Have to get access to the hood release which is INSIDE a LOCKED vehicle to then attach the jump pack. I have jump posts on the outside but too much cable causes too much resistance and it will not start with a dead battery and the jump pack with all that cable resistance even using 2 gauge cable is to much resistance for efficient starting. But the door locks will operate.

Excellent product. Bought multiples of these and installed in multiple vehicles. Good for a cheap and quick layer of anti theft protection. I also have vehicles with electrical drains and cars in storage and this saves me a lot of time by not having to disconnect the battery every time manually. This device will save your batteries for vehicles that don’t get driven often or have an electrical drain. Highly recommended.Also, the remotes -SO FAR- only work for the kit it came with. The remotes from my second kit does not activate or shut off the battery switch from my first kit and vice versa.

I purchased it for my boat and it’s good so far the only down part was I wish the buttons would have some kind of protective cap kind of thing on them bc it’s so easy to push so I’m little worried about pushing it accidentally while it’s in my pocket.

This Battery remote shutoff switch works as it should.Turning off your battery is like you have a dead battery until you turn it on again,then your vehicle is relearning again and you have a clock to reset. Small inconveniences of turning your battery off .A nice way to assure anti-theft.

works great if you have a short that draines battery TRY this have to reset radio

This thing is a life saver. I just bought a van for my business, the car lot didn't tell me there was a battery draining short in it. It was embarrassing showing up to the job site and pulling off battery cable ( unprofessional) I installed this in about an hour ( I had minimal room for hood to close so I had to route behind battery with an extension). This works perfectly every time. I am buying another for an old beater truck for around the house work

Received tonight and installed on my 2010 Toyota Highlander limited. My negative battery cable did not want to fit very well onto this device due to the Angles and the short nature of these newer generation wires. Had to modify by bending the factory negative cable and connector about 30° in order to make it configure. The reason I only give it three stars is because of usage on my particular vehicle. Although it does work as designed I believe this to be an extremely poor idea as used for a parasitic drain or a security measure on your newer generation vehicle. Consider that every time you disconnect your negative lead on your battery, your vehicles ECM computer is going to reset. I don't care at all about the factory clock or radio settings but in the Highlander specifically, when you go to restart the vehicle after reconnecting it will crank over and start for about 1 second and then die every single time. On the second button press it will start and stay running every single time however the computer has reset completely and this is very hard on a car's ECM computer. I will not swear that it is going to jeopardize the ECM computer long-term but it is definitely not good on it. Additionally, your car's fuel economy may suffer as well if your ECM requires constant 12 volt power to remember shift points in the transmission as well as other components needing to reset every time the battery is disconnected.If your intention is to only use this to rectify and unsolvable parasitic battery drain occasionally while you are on a long trip or if your vehicle sits for long. The time between use then I would suggest that it is fine. However I would not use this as an everyday device turn it on and off everyday or even multiple times per day..

Have a parasitic drain in my car that can discharge a new battery overnight. No brainier fast Installation. Work great, and now I have peace of mind. I wished it would have come with a cigarette lighter male plug, but other than that I'm really satisfied. Lets see how long it'll last.