--- product_id: 116362185 title: "Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack)" brand: "ampper" price: "€ 15.21" currency: EUR in_stock: true reviews_count: 13 category: "Ampper" url: https://www.desertcart.at/products/116362185-top-post-battery-disconnect-switch-12v-ampper-quick-disconnect-battery store_origin: AT region: Austria --- # 125A heavy-duty current rating Easy knob twist installation Rust & corrosion resistant build Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) **Brand:** ampper **Price:** € 15.21 **Availability:** βœ… In Stock ## Summary > πŸ”‹ Twist, Disconnect, and Drive with Confidence! ## Quick Answers - **What is this?** Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) by ampper - **How much does it cost?** € 15.21 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/116362185-top-post-battery-disconnect-switch-12v-ampper-quick-disconnect-battery) ## Best For - ampper enthusiasts ## Why This Product - Trusted ampper brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Safety First:** Eliminates parasitic battery drain and secures your electrical system effortlessly. - β€’ **Built to Last:** Solid brass and stainless steel materials ensure rust-free, durable performance. - β€’ **Universal Fit:** Designed for 15-17mm top post terminals on cars, RVs, boats, and more. - β€’ **Compact & Convenient:** Small 3.3" x 1.5" size fits discreetly while providing maximum control. - β€’ **Power Cut in a Twist:** Quick disconnect with simple knob control for instant battery isolation. ## Overview The Ampper Top Post Battery Disconnect Switch is a robust 12V, 125A rated kill switch designed for quick and easy battery isolation on vehicles, boats, and RVs. Featuring a corrosion-resistant brass and stainless steel build, it fits standard 15-17mm top post terminals and offers a simple knob twist operation to prevent power drain and enhance safety. Compact and reliable, it’s a must-have for any professional managing vehicle electrical systems. ## Description Ampper top post knob type battery disconnect master switch for Marine Car Boat RV ATV Vehicles Specifications: 1, Used for top post terminal, 15-17 mm cone battery negative post only. 1, On/Off 2 position. 2, Voltage: 12V, rated current: 125A. 3, Easy to install & simple to use. 4, Knob type, loose / twist of the knob, then power will cut. 5, Solid made, rust and corrosion resistant, durable made for safety use. 6, Can stand alone or be locked together with other switch. 7, Used for battery to isolate and secure the electrical system, eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. 8, Used for Car, Vehicle, RV and Boat, also electrical equipment's switch. 9, Size: 3.3" x 1.5" x 1.5". Complete kits includes: 1 Pack x battery switch Review: Battery disconnect which is easy to install and to use. - I've been working on a 1959 Nash and wanted to install a disconnect which would work well, be electrically reliable, make a proper connection when 'on', and economical so that I could easily disconnect the battery when working on the car. I have always been skeptical of these disconnects built into the terminal clamp. Now that I know how these work and have tried this one I am pleased with it. When you turn the green knob the cable stay physically connected but electrically disconnected. The battery is completely isolated electrically but the cable is not loose. It is quick and easy to use. If you want a visual reminder it is 'off' or to prevent someone from reconnecting the battery you can completely unscrew the green knob and take it out of the cable clamp. I just turn the knob out a few turns and do not remove it from the clamp. I put a dab of DOW #4 on the contacts to prevent corrosion over time. It probably was not necessary as the contacts are plated and battery is protected in the car under the back seat. Review: A life saver, and way cheaper than the alternatives. - Dollar for dollar probably the best purchase I have made in several years of purchases in the automotive department. I looked around all the local auto shops and several websites where I was expected to spend several times as much for a battery power cut off. I found this one to be cheap and reliable, easy to install. All you need is the proper sockets or a good adjustable wrench. Be careful not to put lateral pressure on your battery posts, which should be obvious. Then you just need to to turn the knob all the way counter clockwise to disengage. You can check the first time to make sure you are doing this correctly. This is an alternative to having to pull the battery cable off the battery post if you have a parasitic drain on the electrical which you cannot fix. It may also have an anti-theft application although anyone who can figure out how to hotwire a car can probably get around this. In my case, the diagnostics do not reveal the battery drain and having replaced two batteries I have decided to just live with the need to disconnect overnight. This little gizmo fits the bill and I can't imagine spending more for fancier solutions which do exactly the same thing. ## Features - Compatible: used for top post terminal, 15-17 mm cone battery negative post only, DC 12 V system, rated current: 125 A, On/Off 2 position. - Convenience: knob type, easy to install & simple to use. Loose / twist of the knob, then power will cut. - Heavy Duty: solid made, rust and corrosion resistant, durable made for safety use. - Purpose: used for battery to isolate and secure the electrical system, eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. - Used for Car, Vehicle, RV and Boat batteries which have a standard 15-17 mm cone top post terminal, also used for electrical equipment. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07JYYXJH7 | | Best Sellers Rank | #17,360 in Automotive ( See Top 100 in Automotive ) #41 in Automotive Replacement Battery Switches | | Brand | Ampper | | Brand Name | Ampper | | Circuit Type | 2-way | | Color | Top Post | | Compatible Devices | Car, Vehicle, RV, Boat, Electrical Equipment | | Compatible with Vehicle Type | Compatible for Car, Vehicle, RV and Boat | | Connectivity Protocol | X-10 | | Connector Type | Clamp | | Contact Material | Stainless Steel | | Contact Type | Normally Open | | Control Method | Touch | | Control Type | Power Supply Control | | Current Rating | 125 A | | Customer Reviews | 4.5 out of 5 stars 1,777 Reviews | | International Protection Rating | IP65 | | Item Dimensions | 3.3 x 1.5 x 1.5 inches | | Item Weight | 4.4 ounces | | Manufacturer | Ampper | | Material Type | Brass | | Model | Am-CBS21 | | Mounting Type | Panel Mount | | Number of Positions | 2 | | Operating Voltage | 12 volts | | Operation Mode | ON-OFF | | Part Interchange Info | metal | | Part Number | Am-CBS21 | | Specification Met | UL | | Switch Type | Kill Switch | | Terminal | Top Post | | Unit Count | 1 Count | | Wattage | 1500 watts | ## Product Details - **Brand:** Ampper - **Connector Type:** Clamp - **Contact Type:** Normally Open - **Current Rating:** 125 A - **Item dimensions L x W x H:** 3.3 x 1.5 x 1.5 inches - **Material:** Brass - **Operating Voltage:** 12 volts - **Operation Mode:** ON-OFF - **Switch Type:** Kill Switch - **Terminal:** Top Post ## Images ![Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) - Image 1](https://m.media-amazon.com/images/I/61-5Pr9QAXS.jpg) ![Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) - Image 2](https://m.media-amazon.com/images/I/71PeQHY0FEL.jpg) ![Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) - Image 3](https://m.media-amazon.com/images/I/61WYP2o5lxL.jpg) ![Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) - Image 4](https://m.media-amazon.com/images/I/61AtcGqjyPL.jpg) ![Top Post Battery Disconnect Switch 12V, Ampper Quick Disconnect Battery Cut Off Switch Battery Shut Off Kill Switch for Car (1 Pack) - Image 5](https://m.media-amazon.com/images/I/61T7Ue6lq+L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Does the green knob need to be removed in order to disconnect the battery?** A: Not removed. Simply screw tight to engage battery use and loosen to disengage. The green knob can not fully be removed or misplaced. **Q: What kind of metal is this made out of?** A: It is made of cast zinc, plated with a thin layer of a yellow metal that is similar to brass or bronze. Cast zinc can easily crack under stress as a few reviews mentioned it. **Q: Should the be mounted on the positive terminal or the negative terminal?** A: Must be installed ONLY ON THE NEGATIVE terminal of the battery!!! The reason is safety. The positive terminal has a red plastic cover to protect against accidental shorts which can be very dangerous. The negative terminal does not have a plastic cover because if it shorts to a grounded metal part nothing would happen. If you install it on the positive terminal, you will have exposed metal that can accidentally be shorted. Hope my answer also provides the reasoning such that a user will understand the β€œwhy” not just the β€œhow”. **Q: If you have dual batteries do you need two switches** A: Yes, or choose 1-2-both-off switch: https://www.amazon.com/dp/B07PN9CT9H ## Customer Reviews ### ⭐⭐⭐⭐⭐ Battery disconnect which is easy to install and to use. *by J***S on June 21, 2023* I've been working on a 1959 Nash and wanted to install a disconnect which would work well, be electrically reliable, make a proper connection when 'on', and economical so that I could easily disconnect the battery when working on the car. I have always been skeptical of these disconnects built into the terminal clamp. Now that I know how these work and have tried this one I am pleased with it. When you turn the green knob the cable stay physically connected but electrically disconnected. The battery is completely isolated electrically but the cable is not loose. It is quick and easy to use. If you want a visual reminder it is 'off' or to prevent someone from reconnecting the battery you can completely unscrew the green knob and take it out of the cable clamp. I just turn the knob out a few turns and do not remove it from the clamp. I put a dab of DOW #4 on the contacts to prevent corrosion over time. It probably was not necessary as the contacts are plated and battery is protected in the car under the back seat. ### ⭐⭐⭐⭐⭐ A life saver, and way cheaper than the alternatives. *by G***Y on February 6, 2022* Dollar for dollar probably the best purchase I have made in several years of purchases in the automotive department. I looked around all the local auto shops and several websites where I was expected to spend several times as much for a battery power cut off. I found this one to be cheap and reliable, easy to install. All you need is the proper sockets or a good adjustable wrench. Be careful not to put lateral pressure on your battery posts, which should be obvious. Then you just need to to turn the knob all the way counter clockwise to disengage. You can check the first time to make sure you are doing this correctly. This is an alternative to having to pull the battery cable off the battery post if you have a parasitic drain on the electrical which you cannot fix. It may also have an anti-theft application although anyone who can figure out how to hotwire a car can probably get around this. In my case, the diagnostics do not reveal the battery drain and having replaced two batteries I have decided to just live with the need to disconnect overnight. This little gizmo fits the bill and I can't imagine spending more for fancier solutions which do exactly the same thing. ### ⭐⭐⭐⭐⭐ Works well! I have a 1998 Ford Explorer 5.0L *by D***E on March 15, 2020* I drive a 1998 Ford Explorer XLT 5.0L (in picture) and I have a parasitic drain coming from somewhere and I sometimes drive it . If it's raining or severe weather I'll use my Explorer. I do have a solar charging large panel that I plan to install on the roof to keep its battery charged but not yet . This kill switch for the negative terminal works perfectly . When installing , i had to use a longer bolt to fit through the holes of the side you attach your cars negative terminal with because of the thickness of this switch. I used a headless bolt and it was a good thing there was a smooth section on that bolt so I could srew on a nut to lock it in place to twist the new bolt through everything if you know what I'm talking about. I would suggest ordering a long battery terminal bold and not unless you can take yours to a lowes or home depot to buy what I used . Just make sure if or when you install this , that you have clearance from your hood when its shut. When connecting the negative terminal after the positive is connected, you can have the kill switch engaged like I did to make sure nothing is touching metal when I had it secured down. If you do this and you let this terminal touch your cars metal frame or metal engine component, you will have a electrical discharge or "arch" that can cause injury. To be safe you can use anything non metal like a foam sheet (what I used) or something rubber ,towel, etc. The install time or me took 15 minutes because of the modification I had to do with installing a new bolt & 2 nuts . Thank you for reading my review ! #Deadspacegrave ## Frequently Bought Together - Top Post Battery Disconnect Switch, Ampper Battery Master Switch Isolator for Power Disconnect Cut Off (1 Pack) - Side Post Battery Disconnect Switch, Ampper Battery Master Switch Isolator for Power Disconnect Cut Off (with Long Bolt) - Top Post Battery Disconnect Switch - Quick Disconnect Battery Cut Off Switch for Car Truck Marine RV and Electrical Equipment - 12V/125A - Red --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/116362185-top-post-battery-disconnect-switch-12v-ampper-quick-disconnect-battery](https://www.desertcart.at/products/116362185-top-post-battery-disconnect-switch-12v-ampper-quick-disconnect-battery) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-09-20*