12V Car Battery Protector, Smart Automatic Battery Voltage Disconnect Switch Kit with LED Digital Voltmeter Display, Universal Auto Starter Dual Remote Control Master Kill Switch Car Battery Saver

When I received this battery disconnect, the printing on the installation guide was so light, it was unreadable. It was impossible to install, so I immediately attempted to contact the seller. However, it was a Saturday, the weekend. I’d have to wait until some time Monday……… maybe! 5:30 am Monday, I had a response! Great customer service! In the meantime, I scrolled to the bottom of the page, and all the information I needed was right there all along. Totally unexpected, a nice touch by Bosting! I had my doubts, but I installed it. It works, flawlessly!!! An easy installation, everything I needed. I couldn’t have made a better choice. It may be a bit pricey, but it’s well worth every penny. Highly recommended. I'm very pleased.

I was able to install the device relatively easily once I got a new negative cable and the right tools. I replaced a mechanical cut-off switch which had started to malfunction. This new device works as described! I have a ghost leak in my Mercedes which was draining my battery overnight. This new battery saver/cut-off switch works great. I leave it on "Auto", and it switches off the battery when it reaches about 12.3V, allowing me to use the remote to reconnect the battery with enough juice left to start my car with a big V8. The only slight drawback is that I have to be very close to the car to use the remote. My battery is in the trunk, so it was a hassle to manually open my trunk to engage/disengage the old switch. The available wired manual switch is also an option and it works well. I'm glad I got this switch! Worth the $$

I am a mechanic and I bought this part for a customer, they had a small battery parasitic draw which will kill their battery every time it sits for more than a a few weeks. After finding the draw, it was much cheaper to purchase ad install this kill switch. I installed this switch and voila it did not work, it would turn off but not on, wasted 3 hours of my time trying to get it to work. Ended up purchasing a different brand on Amazon and it worked in a matter of 5 minutes and was cheaper. This product sucks save your time and money and buy something that works.

Its amazing 🔥only thing it reset my radio every time i turn it on . But I love it 👍

Does your car eat batteries?First of all, if you ever jump start your car, you’ve hurt the battery. The best thing you can do is immediately commute with it for a day or two. Four to six hours of driving at any speed and jostling the acid will help it recover.If no one in your family commutes, then put it on a trickle charger overnight twice. I know, the alternator does the same thing, but it doesn’t. You need to get the battery absolutely topped off and keep it there a while to reverse the chemical process. Draining your battery until the car won’t start is always serious—start batteries HATE going below 50%.My wife’s 2001 Honda Odyssey eats batteries because the interior lights do not automatically turn off if the key is out for too long. Stupid design from an otherwise smart company. It has a seven hundred CCA battery that was down to 400 CCA, so leaving the headlights on for 5 minutes would make it not start. This was not the first battery that died early.So I replaced the car battery and installed this device. The install was easy, I put it on the positive side but I strongly recommend you put it on the negative side. You will have an exposed terminal unless you wrap it up, and it will probably not look good. Exposed negatives are better.Basically this is a smart relay. It monitors the battery voltage and cuts off all power if the voltage drops to 12.25 Volts. That’s probably realistically a 50% drop. You hit the button, start the car, and you’ve avoided 95% of the damage of a fully dead battery.If you have a short so that the car discharges on its own, that’s much worse. Use this device to shut off all power every time you drive, so the battery is 100% all the time.I stuck the wired remote switch underneath the back edge of the hood near the driver’s wiper. So my wife can use the remote, hit the button, or pop the hood and hit the button on the device.My daughter immediately clicked the wired button over and over. The car was dead. Turn it back on with a single click of the wired button, no big deal, but it took a while to figure out.The main wire is a gauge too light for my liking. I would not install this on a diesel.The voltage gauge that shows hundredths of a volt on the main unit is a nice touch. It only illuminates occasionally, but knowing the exact voltage of your battery is a huge plus.Back to my first comment, with this device, you can monitor the health of your battery and alternator. With a new battery turn off your car and let it sit overnight. The next morning, turn on the battery and look at the reading. That reading is good. Higher is better. It should be about 12.85V, but every battery is a little different. A slightly discharged or failing battery will show a lower voltage in the morning. Batteries always want to be fully charged, so if you see a drop of 0.10V, consider a long drive or an overnight trickle charge top up.Test your alternator by turning on the engine and every electrical component including the A/C and seat heaters. At idle you should see 14.1 to 14.4 volts, if so, you’re good to go. Unlike a dash voltage gauge, this thing is real.Do all this and you might get 10 years from a battery.

I tried four of these and this by far is the best and it's the only one that works. The shut off voltage is adjustable so the battery doesn't disconnect until the adjusted voltage. The quality is the best also. So far it's working perfect.

Unit seems well made, but the remotes are poor. Operation is difficult because the remote doesn’t respond well. The instructions are very faint making them difficult to read. A good feature of the remote is it can’t be accidentally activated because the function change time period is only 10 seconds.

Not designed for side post batteries but I was able to attach it with an additional screw-in post from the parts store.Been working very well so far.

A really wonderful piece of kit, very well made and of good quality. It's perfect for my use of isolating the battery in my car. I really like the idea of choice as to which terminal you connect to, everything you need to make the decision is in the kit. Very pleased with my purchase.