Battery-Disconnect Switch - Will Fit Both Side Post and Top Post

Inexpensive but well-made, this Disconnect Switch is simple to install in a couple of minutes. We put one on my wife's minivan to secure it after an attempted break-in and it works great! Unscrew the knob about one turn and, while a small amount of current through the fused jumper maintains radio and other memory functions, high-current functions like the starter are totally disabled.Unscrew the knob completely out of the switch and take it with you for maximum security and as a reminder you have disabled the system. My wife has already blown two fuses, forgetting she had disconnected the battery. It works as advertised: but with the switch open, turn the key, the fuse blows, everything goes dead, and you spend the next ten minutes re-programming the radio. Popping a fuse doesn't hurt anything, but volatile memory will disappear. You can still tighten the knob, closing the switch and start the engine, so it's only a convenience and not a safety issue.If you buy one of these switches, lay in a good stock of 15A mini fuses too . . . you will blow several before you learn the new starting drill!

I have a mixed review. I first purchased this battery disconnect switch in 2013, and that one has worked very well for many years now. I purchased a second one in 2022 for a different vehicle, and that one failed (threads stripped) on the first day. It appears the quality has declined over time.

My wife's 1981 El Camino has an electrical problem that drains the battery after a week or so and we've been unable to find the cause. This resulted in having to replace the battery every year as it'd get to the point where it wouldn't take a charge.I ordered this bit of hardware in the hopes that it'd save the battery. It did.Installation was easy... the adapter for side mount batteries worked fine, but I did have to spend a nice chunk of change at PepBoys for a post adapter for the other end of this switch.The end result though is that when my wife gets home at night, she raises the hood, turns the knob and knows that the battery will be charged the next time she needs to drive the car.If you have a car that doesn't get driven often, or has an electrical problem as I've described, I think this is a great solution for a reasonable price.

I bought two of these items. One did not fit onto my 2006 Corvette battery because of the positioning of the battery so I returned it. The one I kept I placed onto my 2002 F150 and use it often!! I went through three batteries with the truck sitting before I installed this and since then I haven't bought another battery!! I do not use the fuse functions for memory saving purposes because I was afraid of draining the battery while the truck sits for long periods. I would recommend this product to others.

I believe the claims to fit both a side post and top post battery are very misleading and inaccurate. Since I live out in the country, I bought this thinking I could install it without additional parts. As well, the fused link defeats the purpose of a battery disconnect. When I tried to install this on a side post battery there are in sufficient parts to complete the installation. There is no way to connect the cable to the other end of the switch. To use this I had to travel to town (I live 50 miles from town) and get nuts and bolts ($2.20) to get it to work. I you install the fused link, then you still get battery drain from the on-board electronics and within a short week (at least in a GMC pickup) the battery is dead. I do NOT recommend the purchase of this switch for a side post battery.

Readily installed on my 2007 Tundra. Only abut 15 minutes to install. Only needed to position the device to clearobstacle's but still easy to install. I did not install the by pass wire that powers the radioand computer when car ignition is off. Just did not need that feature as I only listento 2 radio stations here in Vermont (we have more then 2 but I don't listen to them)so easy to reprogram when needed.Now just need to remember where I keep the screw on part of the switch when I need it. :-)recommendedMarty K

No what expected... wont work for me.

This product is good when you have your car in storage for over the winter and you can with indoor car shows good value for its money.