---
product_id: 318745995
title: "Side Post Knife Blade Master Switch, Ampper 12V / 24V Battery Disconnect Switch Isolator for Marine Car Boat RV ATV Vehicles (with Long Bolt)"
brand: "ampper"
price: "$U2079"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/318745995-side-post-knife-blade-master-switch-ampper-12v-24v-battery
store_origin: UY
region: Uruguay
---

# 200A continuous, 600A momentary power Knife blade design for quick disconnect Solid brass, rust & corrosion resistant Side Post Knife Blade Master Switch, Ampper 12V / 24V Battery Disconnect Switch Isolator for Marine Car Boat RV ATV Vehicles (with Long Bolt)

**Brand:** ampper
**Price:** $U2079
**Availability:** ✅ In Stock

## Summary

> 🔋 Cut the power, not the adventure — master your battery with ease!

## Quick Answers

- **What is this?** Side Post Knife Blade Master Switch, Ampper 12V / 24V Battery Disconnect Switch Isolator for Marine Car Boat RV ATV Vehicles (with Long Bolt) by ampper
- **How much does it cost?** $U2079 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/318745995-side-post-knife-blade-master-switch-ampper-12v-24v-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

- • **Effortless Control:** Knife blade switch design lets you cut power instantly with a simple lift—no fuss, no tools.
- • **Safety First, Always:** Eliminates power draw when not in use, protecting your battery and electrical system from drain and damage.
- • **Power Meets Precision:** Handles up to 200A continuous and 600A momentary current for reliable battery isolation.
- • **Universal Compatibility:** Fits GM side post batteries with 3/8" hole, perfect for cars, boats, RVs, and ATVs.
- • **Built to Brave the Elements:** Crafted from solid brass, ensuring rust-free, corrosion-resistant durability for marine and outdoor use.

## Overview

The Ampper Side Post Knife Blade Master Switch is a heavy-duty, solid brass battery disconnect switch designed for 12V-24V systems. Compatible with GM side post batteries featuring a 3/8" hole, it supports 200A continuous and 600A momentary current. Its knife blade design allows quick, tool-free power isolation, preventing battery drain and securing your vehicle or marine electrical system with corrosion-resistant durability.

## Description

Side Post Knife Blade Master Switch, Ampper 12V / 24V Battery Disconnect Switch Isolator for Marine Car Boat RV ATV Vehicles (with Long Bolt)

## Features

- Compatible: with a long bolt, used for side post terminal, battery side post with 3/8" hole only, recommended to mount on NEGATIVE battery post, DC 12V-24V system, 200A continuous and 600A momentary at DC 12V, on/off 2 position.
- Convenience: knife blade type, easy to install & simple to use. Lift the knife, then power will cut.
- Heavy Duty: solid brass 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.
- Compatible with GM side post batteries or other batteries which have a 3/8" side post terminal, also used for electrical equipment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Ampper |
| Brand | Ampper |
| Model | Am-CBSKB02 |
| Product Dimensions | 7.01 x 9.5 x 7.49 cm; 240.97 g |
| Manufacturer reference | Am-CBSKB02 |
| Exterior | metal |
| Manufacturer part number | Am-CBSKB02 |
| Special Features | Used for car battery systems, compatible with GM side post batteries, disconnects the battery safely, eliminate any power draw from the battery when vehicle or boat is not in use, isolate and secure the electrical system |
| Lift type | ON-OFF-ON |
| Item Weight | 241 g |

## Product Details

- **Operation mode:** ON-OFF-ON
- **Current rating:** 200 Amps
- **Operating voltage:** 24 Volts
- **Contact type:** Normally Open
- **Connector type:** Screw
- **Brand:** Ampper
- **Switch type:** Kill Switch
- **Terminal:** Blade
- **Material:** Brass
- **Item dimensions L x W x H:** 7 x 9.5 x 7.5 centimetres

## Images

![Side Post Knife Blade Master Switch, Ampper 12V / 24V Battery Disconnect Switch Isolator for Marine Car Boat RV ATV Vehicles (with Long Bolt) - Image 1](https://m.media-amazon.com/images/I/61ANBOj6EML.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: Will this work on a c5 corvette ?**
A: Well, yes but. It's REALLY tight in there, up against the fuse box. Figure on cursing and scraped knuckles. You can't swing a wrench and a socket won't fit in there. I pulled the battery loose, first attached the - cable to the switch, then attached using the long bolt and my fingers. Finished up with a very short wrench from my toolbox. A real pain but the switch seems to work well and makes disconnecting a breeze.

**Q: Why does it have to be connected to the negative terminal and not the positive terminal?**
A: That's ok, positive or negative can be connected.
We recommend to install this cut off switches on the negative, not the positive, because lower current in negative, will be more safety. 
The switch can be install in the negative/positive  wire, another short battery cable or cut existing cable and attach terminals on each end.

**Q: Will this fit a duralast gold 101-dlg? cadillac 2007 sts.**
A: i bought it for 1977 corvette and it fit I am sure it will fit your sts.

**Q: Does this disconnect work on newer model cars**
A: 1. you will need about a 3" space next to the negative terminal in order to have room to install this switch.  2. depending on the vehicle you will need clearance for the "knife" to be up in order to close the hood, or it could be installed so it opens to the side if there is enough room there.  3. disconnecting the battery may require radio code for the radio to operate again after removing the power.  Other functions may be affected too like the clock, possibly other functions as well  4. you will need the proper tool to tighten the bolt to the battery otherwise it will move about as you operate the switch. I am using this on a full size chevy snow plow yard truck (off road only) with plenty of room and I don't need the clock, that one does not need radio codes after disconnection.  Look at the pictures carefully to decide if it will fit on your vehicle, if it fits, it will work.

## Frequently Bought Together

- Side Post Knife Blade Master Switch, Ampper 12V / 24V Battery Disconnect Switch Isolator for Marine Car Boat RV ATV Vehicles (with Long Bolt)
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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-22*