The unit connects to the battery like it's supposed to, shuts it off there is no withdrawal on it it looks good

I haven’t had the chance to hook this VSTM battery disconnect switch up yet, but I wanted to share a first impression because it seems really well made. The construction feels sturdy—metal parts where it counts, not cheap plastic—and the LED voltage display is a really nice touch. I like that it only lights up when the switch is on, so it won’t slowly drain the battery while it’s sitting.

The side post design looks simple enough to install. I’ve had disconnect switches in the past that were bulky or needed extra cables, but this one seems straightforward—just clamp it on, tighten it up, and go. I also appreciate the matte display cover, since I know how easily glossy screens get scratched up under the hood.

The specs seem solid too: rated up to 80 volts and 250 amps continuous, which should handle just about anything I’d need it for. I’m planning to use it on my RV, mainly for storage and safety when it’s parked, and the compact size is a plus since space is always tight.

So far, I’d give it a tentative 4.5 out of 5 stars—it looks and feels promising, and if it performs half as good as it looks, it’ll be a great addition. I’ll update once I’ve had a chance to actually put it to work, but first impression is very positive.

I use this as my primary contactor on my diy 72v (84v max) ebike. MOST excellent. Its simple design give one many options for configuration on any custom builds. I've cycled this thing hundreds of times and it still works like a champ. The post mounts are THICK and use beefy screws. All in all, good stuff.

Great product. Very fancy looking!

One- I LOVE the voltage readout- this is the main reason many of us have these disconnects on our vehicles/equipment.
It doesn't get any easier than to turn the dial, and power is on.
instructions are simple, installation very easy

Proper battery disconnect!

If you want to be able to disconnect your battery for storage or other reasons with ease, this disconnect is a good option. It can be installed onto your negative battery cable, and with the turn of a nob, your battery will be isolated from the vehicle.

There's a built it voltage display, which is very nice. It turns off when the battery is disconnected, so that it does not drain the battery voltage while in storage. This is also optional. You can leave the voltage lead disconnected if you don't need the information displayed. I'm considering installing it with a momentary switch that I can press to display the voltage, and not have it on the whole time this unit is switched on. But as it comes, everything works perfectly as designed, and the voltage displayed is accurate.

The build quality is nice, and theres a solid, positive feel to the disconnect when it engages either in the "ON" or "OFF" positions. Beware that there is a null zone where it is in between on and off, and to properly connect or disconnect, you need to make sure it locks in its respective position. This is not a flaw, it's just the way it's designed, and it locks in the off position securely so no accidental connection occurs.

It comes with instructions and specs, so you can be sure what applications you can use it on. According to this paperwork, it is good for 250A continuous load, and 300A momentary. So for most cars and light trucks, this should be fine. My 5.3L V8, for example, draws around 250A to 300A on startup, so that maxes this unit out, and mightbeven exceed its rating under certain conditions. So do your own calculations, and refer to the included Current Chart for safe and proper installation.

It's also rated for 5V to 80V DC, so you can use it on other applications other than automotive.

The hardware and threaded holes are 3/8"-16, the same as the sidepost battery hardware commonly used on GM vehicles.

The price seems to be in line with what you're getting, so I'd say it's a good value.

As for size, it's not huge, but not compact either. It will fit in many applications, but its size could limit where you install it. I've included a couple of photos of it next to a business card for reference.

Works great

Solid little disconnect switch — exactly what I needed for isolating my battery setup. The installation was simple and straightforward, even in a tight space. Feels sturdy and well-built with smooth operation when turning on/off. I’ve been using it regularly, and it holds up great with no voltage drop or connection issues. Excellent functionality for the price — definitely recommend for RVs, trailers, or any custom power setup, ideas mentioned battery life but it doesn't have a battery.

This disconnect switch is designed really well and when you activate and deactivate the connection you can feel a good solid switch on and off. I ran into a problem at first with my regular size battery because the battery cell bump-ups forced the switch to position into the center of the battery resulting in the lid to the outdoor storage box not being able to latch closed. Not only is the switch built quite sturdy, but that also makes it somewhat large in both length and height. The switch does not appear to be waterproof so I needed it in the enclosure. I was excited to discover that my wide high-capacity battery accommodated that positioning without a problem and the enclosure does close just fine. Yay! Connecting it was quite easy after verifying with the instructions how it was meant to be installed. It’s important to connect it to the negative terminal and to ensure the side labeled as input is the side that you connect to the terminal. If either of those instructions are not followed correctly, it won’t work properly. This switch is an amazing value for the money since it is also helping to protect my camper from damage. I’ve always cringed when hooking up the battery because there’s always a spark when I connect up the terminals and one time I was distracted and accidentally connected the terminals in reverse and blew multiple fuses. With this switch, I can fully connect the battery with the line switched off and double check my connections before turning the line on. I also really like and enjoy that when we return from our trips that I’m able to just switch off the battery rather than undoing everything. That means I’ll no longer find that the battery fully discharged because I took too long to get back to it. I’ve ruined numerous batteries because I discharged them one too many times. All I do now is turn off the switch at the same time I make sure the propane is turned off so now my battery will finally last for years.

For whatever reason, after installing this gadget in my car, I was immediately flooded with childhood memories of the "cut the power" scene from the 1996 movie Daylight. Don't ask.... I'm weird.

Anyway, what we have here is 𝗯𝗮𝘀𝗶𝗰𝗮𝗹𝗹𝘆 𝗮 𝗰𝗶𝗿𝗰𝘂𝗶𝘁-𝗯𝗿𝗲𝗮𝗸𝗲𝗿 𝗳𝗼𝗿 𝘆𝗼𝘂𝗿 𝗰𝗮𝗿'𝘀 𝗽𝗼𝘄𝗲𝗿. Attaching it directly to the negative terminal of your battery; 𝘁𝗵𝗶𝘀 𝘀𝘄𝗶𝘁𝗰𝗵 (𝘄𝗵𝗲𝗻 𝘁𝘂𝗿𝗻𝗲𝗱) 𝘄𝗶𝗹𝗹 𝗲𝗳𝗳𝗲𝗰𝘁𝗶𝘃𝗲𝗹𝘆 𝗱𝗶𝘀𝗮𝗯𝗹𝗲 𝗔𝗟𝗟 𝗽𝗼𝘄𝗲𝗿 𝘁𝗼 𝘁𝗵𝗲 𝘃𝗲𝗵𝗶𝗰𝗹𝗲. I presume this is for those folks who find it disconnecting the cable from the battery to be too much of a chore. Alternatively, this is a good device for those who have cars in storage that only come out to play on occasions.

Adorning this robust breaker is a 𝗟𝗘𝗗 𝗱𝗶𝘀𝗽𝗹𝗮𝘆 𝘀𝗵𝗼𝘄𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗯𝗮𝘁𝘁𝗲𝗿𝘆'𝘀 𝗰𝘂𝗿𝗿𝗲𝗻𝘁 𝘃𝗼𝗹𝘁𝗮𝗴𝗲. See what I did there? Hehe "current".... "voltage". Comedy genius. *ahem*. 𝗛𝗼𝘄𝗲𝘃𝗲𝗿 𝘂𝘀𝗲𝗳𝘂𝗹 𝘁𝗵𝗶𝘀 𝗱𝗶𝘀𝗽𝗹𝗮𝘆 𝗖𝗢𝗨𝗟𝗗 𝗛𝗔𝗩𝗘 𝗯𝗲𝗲𝗻, 𝗶𝘁'𝘀 𝘀𝗮𝗱𝗹𝘆 𝘁𝗵𝘄𝗮𝗿𝘁𝗲𝗱 𝗱𝗲𝗽𝗲𝗻𝗱𝗶𝗻𝗴 𝗼𝗻 𝘁𝗵𝗲 𝗹𝗼𝗰𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗼𝗿𝗶𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝘆𝗼𝘂𝗿 𝗰𝗮𝗿'𝘀 𝗯𝗮𝘁𝘁𝗲𝗿𝘆. In may case, it's almost completely unobservable.
Also keep in mind that the display is always on. So, it will slowly drain your battery.

While 𝗜 𝗰𝗮𝗻 𝗽𝗿𝗮𝗶𝘀𝗲 𝘁𝗵𝗲 𝗴𝗮𝗱𝗴𝗲𝘁'𝘀 𝗿𝘂𝗴𝗴𝗲𝗱 𝗰𝗼𝗻𝘀𝘁𝗿𝘂𝗰𝘁𝗶𝗼𝗻, 𝗜 𝗰𝗮𝗻'𝘁 𝘀𝗮𝘆 𝘁𝗵𝗲 𝘀𝗮𝗺𝗲 𝗮𝗯𝗼𝘂𝘁 𝗶𝘁𝘀 𝗼𝘃𝗲𝗿𝗮𝗹𝗹 𝗱𝗲𝘀𝗶𝗴𝗻. It seems to be 𝗯𝗲𝘁𝘁𝗲𝗿 𝘀𝘂𝗶𝘁𝗲𝗱 𝗳𝗼𝗿 𝗼𝗹𝗱𝗲𝗿 𝘃𝗲𝗵𝗶𝗰𝗹𝗲𝘀 𝘄𝗵𝗼 𝘄𝗶𝗹𝗹 𝗵𝗮𝘃𝗲 𝗺𝗼𝗿𝗲 𝗿𝗼𝗼𝗺 to work with while newer cars, who have compact engine compartments, will struggle to find a way to make it fit. Therefore making the ease of its installation a gamble. I advise you to 𝘄𝗮𝘁𝗰𝗵 𝗺𝘆 𝘃𝗶𝗱𝗲𝗼 𝘁𝗼 𝗴𝗲𝘁 𝗮𝗻 𝗶𝗱𝗲𝗮 𝗼𝗳 𝗶𝘁𝘀 𝘀𝗶𝘇𝗲 𝗯𝗲𝗳𝗼𝗿𝗲 𝗽𝘂𝗿𝗰𝗵𝗮𝘀𝗶𝗻𝗴.

Final Feel:
I̲n̲ ̲a̲l̲l̲ ̲h̲o̲n̲e̲s̲t̲y̲,̲ ̲n̲o̲ ̲o̲n̲e̲ ̲N̲E̲E̲D̲S̲ ̲t̲h̲i̲s̲ ̲d̲e̲v̲i̲c̲e̲. That includes me and you. While it will save you a few minutes and eliminates the need for tools to disconnect the power to your vehicle, ̲y̲o̲u̲ ̲s̲h̲o̲u̲l̲d̲ ̲a̲s̲k̲ ̲y̲o̲u̲r̲s̲e̲l̲f̲ ̲"̲H̲o̲w̲ ̲o̲f̲t̲e̲n̲ ̲d̲o̲ ̲I̲ ̲n̲e̲e̲d̲ ̲t̲o̲ ̲d̲i̲s̲c̲o̲n̲n̲e̲c̲t̲ ̲t̲h̲e̲ ̲p̲o̲w̲e̲r̲?̲"̲. If your answer is "often", then it may serve you well enough that you'll consider it a blessing. If not.... then I would recommend you not bother. Additionally, I̲ ̲d̲o̲n̲'̲t̲ ̲r̲e̲c̲o̲m̲m̲e̲n̲d̲ ̲t̲h̲i̲s̲ ̲p̲r̲o̲d̲u̲c̲t̲ ̲f̲o̲r̲ ̲v̲e̲h̲i̲c̲l̲e̲s̲ ̲w̲i̲t̲h̲ ̲v̲e̲r̲y̲ ̲r̲e̲s̲t̲r̲i̲c̲t̲i̲v̲e̲ ̲e̲n̲g̲i̲n̲e̲ ̲c̲o̲m̲p̲a̲r̲t̲m̲e̲n̲t̲s̲. Unless you have the highly dexterous hands and fingers of a skilled proctologist.

Being a car collector I LOVED the. Solid clock on/ of is a game changer over the old fashioned "green knob" type where you don't always know if it's disconnected or not. There voltage read it is the cherry on top!
I will say, the side mount ones after much harder to install and use for to limited space& I can't read the voltage, but still I changed then all out from the"green dial" ones!!