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Your cart is empty.Product Description
Easy Installation:
1.Disconnect master power before installation
2. Choose a suitable and easy-to-operate location for the battery shut-off switch.
3. Disconnect the negative cable of the battery first to ensure that no current will pass through during installation.
4. Finally, connect the positive and negative wires to the switch.
5. After ensuring all the connections are made correctly, reconnect the negative cable of the battery. Finally, verify that the battery disconnect switch is functioning properly.
Specification
- Current Rating: 300 Amps
- Operating Voltage: 24 Volts
- Intermittent Current: 1000 Amps
- Material: Alloy and copper
- Product Size : 4.3 x 3.5 x 3.5 inches)
lifegetsbetter
Reviewed in the United States on March 16, 2025
The battery disconnect switch has a nice solid throw, with firm solid handle. It Comes with a faceplate showing handle movement from on to off.The shaft of the switch will require a 3/4” hole for mounting. The lugs are copper, with brass nuts, and lock washers.This Comes with 2 copper crimp lugs, 4 red shrink tubing pieces, and 2 rubber covers for the lugs/mounting bolts shown in the photos.The description lists the current rating at 300 amps. I’m Not sure about that, as I don't have a battery current that high, but it appears robust enough for automotive current.
H. F.
Reviewed in the United States on March 15, 2025
Open the nondescript white box and behold this hefty-looking battery cutoff switch, which the seller, Aheszeed, rates at 12-24V at up to 300 A. This is described as a “heavy duty” (Isn’t EVERYTHING on Amazon “heavy duty?”) switch for “disconnect,” “battery kill,” and isolation applications.The switch is indeed robust, featuring a metal shell with a swaged-in, two-brass-stud terminal block. The switch is suitable for mounting in a dashboard or instrument panel. The kit comes with ring terminals and insulator boots for the terminal studs. Very Nice. So why not a 5-star rating?I wired the switch to a calibrated DLRO (digital low-resistance ohmmeter) and measured the closed-contact resistance at 8.5 milliohms. That probably doesn’t sound bad, until you juxtipose that against the claimed 300-amp rating. At a 300-amp draw, 8.5 milliohms would result in (0.0084 x 300 = 2.52) a voltage drop of 2.5 volts. If this switch were wired into a 12-volt starter circuit, for example, the loss in the switch at 300 amps would result in a voltage-at-the-starter-motor of less than (12 – 2.52 = 9.5) 9.5 volts, and we haven’t even accounted for droop in the battery itself.During that interval, the loss in the switch is (300 x 2.52 = 756) 756 watts! That’s a lot of heat energy in a set of switch contacts.Either I received a bad switch, or there is no way this switch is rated for 300 amps... at least not for continuous duty. Because of the large voltage drop across the terminals, even if it will tolerate 300 amps without self-destruction, it’s going to starve a 12-volt starter motor.Bottom line: This is a nice switch with plenty of potential applications, but my gut feeling is that it’s more appropriate for 50-amp-or-less loads, where loss in the switch would be under a half volt.
Kids Feathers and Fur
Reviewed in the United States on March 10, 2025
Solid feel, substantial weight, battery cut-off switch seems meant for heavy-duty applications. After reading reviews for other cut-off switches where the plastic switch was described as cheap feeling, I decided to order the Aheszeed 12-24V Battery Disconnect Switch. It is definitely overkill for my application, which is to cut the power to a group 27 marine battery on a pop-up camper. The 8 AWG cable I normally use for the battery fit a ring terminal that easily screws onto the battery post, but is too small for the post on the cut-off switch. I had to make a separate trip to the store for a 6 AWG ring terminal and crimp the 8 AWG wire onto it so I could hook everything up. It was a pain in the backside.The cut-off switch doesn't come with mounting hardware, so you're on your own for that. I bolted a 1/2 inch plywood board to a secure spot on the trailer tongue and mounted the switch to it. It works, so it was worth the time and trouble to install it. For reference, the price of the switch is currently $8.99 and I paid about $17 for materials to install it, in addition to hardware that I had on hand.
Bob H. Ray
Reviewed in the United States on February 24, 2025
I needed a battery cuttoff switch for a 12V 300A battery, and when it arrived I was surprised how heavy it was. I guess I was expecting a plastic assembly however this switch is made of heavy metal, has large 3/8" contact posts, and comes with heavy copper crimp connectors suitable for 2 ought cables, as well as red shrink tube and terminal boots. The switch is an SPST latching rotary switch, with about 30 degrees rotation to throw it. There is an aluminum on/off indicator ring, and it is designed for panel mounting through no more than 1/4" material. I have not tested it's current carrying capacity yet, however I feel it is a very good value for such a heavy duty switch.
Glock 26
Reviewed in the United States on February 18, 2025
This seems to be a well made switch for disconnecting a battery. I was going to use it on a 100 amp battery box that I made, but it is quite a bit larger than it appears in the Amazon listing picture, so it won't fit where I wanted to use it.Make sure you take note of the dimensions in the listing, so that you have room to install it.
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