QuickCar Racing Products 55-010 Red 2-1/2" High x 2-1/2" Wide Handle Battery Master Disconnect Switch with Black Mounting Panel

Installed this to isolate my battery when the car sits for extended periods and it works exactly as intended. The red color makes it easy to find at a glance and the build quality feels like it will last. No electrical issues since installing, everything operates normally with the switch on. Simple mod that gives real peace of mind.

I installed this in my Land Rover Defender to as a way to cut off the battery and isolate it when parked. This switch is super sturdy and very easy to install. It also looks great.

I just received mine and have not installed it yet. It is very solid and appears very well made. My problem is that it may be difficult to use in my application which is for my pontoon boat. I planned on mounting it to a 3/4 inch thick instrument panel I made from wood. The mounting panel isn't big enough to cover the size hole I must drill in the panel to get the switch into. The switch has to be mounted from the back side of the dash panel and can only accommodate a panel up to about 1/4 inch thick. If there were photos of the switch from the side it would have been obvious that the mounting panel is only barely bigger than the switch body. So... There is nothing wrong with the switch. It may not work for me and I could not tell before buying it because the Amazon listing didn't have enough info or photos about the product. EDIT Feb 21, 2021... I just revisited this review because someone asked a question about this switch. I was able to use the switch but I don't remember how I solved the problem because it was 4 years ago. I can say that the switch has preformed flawlessly for my application which was as a master switch to the accessories on my boat.

Fits great, easy to install, made of great product, shuts power off instantly. Great product for the price.

This master disconnect switch is simply an open/close switch. I installed it to disconnect the ground (negative wire) from the vehicle's chassis to my Amp-style 40-farad hybrid capacitor which immediately isolates power to my amplifiers. This can prevent electrical fires and is also very useful when removing and replacing the vehicle's battery. Connecting a battery to a uncharged/discharged hybrid capacitor causes an extremely fast, high-current transfer of energy which will result in a huge spark. The price and quality was on point.

Excellent quality

I have three in rzrs. They work great for me. I had to replace 1 in 3 years...not bad for this price point. Would buy again

It's a cut off switch. You either have power or not. On/Off! Hardest part was drilling a hole for the front to come through.

Fits well where I had my previous switch mounted, the red handle is a nice touch.

Well its not exactly the most complicated electronic device but it has sure been reliable to me. It works great and I love the graphics

Exactly as described. Nice and sturdy. Been using it everyday for a month. Zero issues. Comes with a nice sticker also

Works good