---
product_id: 17480998
title: "20308 Battery Doctor Top Mount Compact Battery Switch without Fused Bypass"
brand: "wirthco"
price: "A$36"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/17480998-20308-battery-doctor-top-mount-compact-battery-switch-without-fused
store_origin: AU
region: Australia
---

# 500A surge rating Compact fit for most batteries Removable knob theft deterrent 20308 Battery Doctor Top Mount Compact Battery Switch without Fused Bypass

**Brand:** wirthco
**Price:** A$36
**Availability:** ✅ In Stock

## Summary

> 🔋 Take control of your power with the ultimate compact battery switch!

## Quick Answers

- **What is this?** 20308 Battery Doctor Top Mount Compact Battery Switch without Fused Bypass by wirthco
- **How much does it cost?** A$36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/17480998-20308-battery-doctor-top-mount-compact-battery-switch-without-fused)

## Best For

- wirthco enthusiasts

## Why This Product

- Trusted wirthco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Compact:** Designed to fit seamlessly in tight battery compartments
- • **Anti-Theft Ready:** Remove the knob completely to secure your battery from theft
- • **Quick Disconnect:** Easily disconnect or reconnect with a simple knob twist
- • **Power Through Surges:** Handles up to 500 amps surge for ultimate reliability
- • **Effortless Installation:** Mounts directly on the negative battery post for fast setup

## Overview

The WirthCo 20308 Battery Doctor is a top-mount, compact battery switch rated for 500 amps surge and 125 amps continuous at 12 volts. It installs easily on the negative battery post, features a removable knob for theft deterrence, and fits most battery compartments, making it a reliable and space-saving power control solution.

## Description

WirthCo20308 Battery Doctor Top Mount Compact Battery Switch without Fused Bypass

## Features

- Easy to install on negative battery post
- Battery can be disconnected by unscrewing the knob a few turns and reconnected by tightening the knob
- Knob can be removed completely to deter theft
- Compact size fits most battery compartments
- Rated 500 amperes surge and 125 amperes continuous at 12 Volts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Operation Mode | Battery |
| Current Rating | 1 Amps |
| Operating Voltage | 12 Volts |
| Contact Type | Normally Open |
| Connector Type | Clamp |
| Brand | WirthCo |
| Terminal | Physical |
| Item dimensions L x W x H | 1.5 x 4.5 x 7 inches |
| Circuit Type | 1-way |
| Mounting Type | post mount |
| Actuator Type | Knob |
| Contact Material | Phosphor Bronze |
| Number of Positions | 2 |
| Control Method | Touch |
| Connectivity Protocol | Wi-Fi |
| Unit Count | 1.0 Count |
| Number of Items | 1 |
| Global Trade Identification Number | 00010054203081 |
| Manufacturer | WirthCo |
| UPC | 010054809030 010054203081 077348584721 |
| Model | 20308 |
| Item Weight | 3.87 ounces |
| Product Dimensions | 1.5 x 4.5 x 7 inches |
| Country of Origin | China |
| Item model number | 20308 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 20308 |
| OEM Part Number | 20308 |

## Product Details

- **Operation Mode:** Battery
- **Current Rating:** 1 Amps
- **Operating Voltage:** 12 Volts
- **Contact Type:** Normally Open
- **Connector Type:** Clamp
- **Brand:** WirthCo
- **Terminal:** Physical
- **Item dimensions L x W x H:** 1.5 x 4.5 x 7 inches
- **Circuit Type:** 1-way
- **Mounting Type:** post mount

## Images

![20308 Battery Doctor Top Mount Compact Battery Switch without Fused Bypass - Image 1](https://m.media-amazon.com/images/I/51325QnVgEL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple
*by J***K on June 23, 2019*

This thing works great. Simple to install, simple to use. Build quality A+. Use this if you park your car for a week or more without turning it on. Storage and long term parking in an airport come to mind. Not only does it kill battery drain with normal on/off, the whole knob can come off which makes your vehicle theft proof. If your vehicle has an electronic key, make sure the windows are up and the doors are open before you turn off the battery. Your doors will lock automatically when electricity stops being sent to them and you will be locked out of your car. This happened to me and I had to call AAA to get me back in. Close your doors after the battery is turned off. If you remove the knob entirely for anti theft, throw it in the glove box until you need to reinstall. The chances of a thief figuring out how to reactivate your vehicle is less than zero.

### ⭐⭐⭐⭐⭐ A $5 DEVICE THAT CAN SAVE YOUR $100-200 BATTERY, IF YOU OCCASIONALLY DON'T USE YOUR VEHICLE FOR A WEEK!
*by H***Y on March 10, 2015*

Perfect. This is my second - I've had the other for 3 years. If you have a car that you might leave non running for a week or more at a time - this can save your $100 or $200 battery like it did for me. I got tired of killing DieHard batteries - they were under warranty but I felt bad for the store. Those newer gel batteries are not meant for deep discharge - you can't run them all the way down like a trolling battery on a fishing rowboat. The electronics in a car might run the battery out after a week or two of the car sitting around. Recently my truck battery went dead. The warranty was for 6 more years on this gel DieHard, but guess what - Sears near me closed down. So Costco's best battery - with 4 year warranty - was just under $100, and I think it's the same battery. When I installed it, I noticed the interior cabin light lit up in the truck. What the hell? Did I leave that thing on accidentally. So I bought one of these for the truck, and now, no worries.

### ⭐⭐⭐⭐ Cuts the power just like it should.
*by T***R on November 19, 2010*

I have a vintage car that likes to drain the battery. After adding the switch, I was able to cut the drainage with a twist of the switch instead of disconnecting the cable. Very useful product and now I know my battery is ready to go when I need it.

## Frequently Bought Together

- WirthCo 20308 Battery Doctor Top Mount Compact Battery Switch without Fused Bypass
- Battery Doctor 20138 Battery Disconnect Switch for Top Post Terminal, 12v Battery Kill Switch

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**Shop now:** [https://www.desertcart.com.au/products/17480998-20308-battery-doctor-top-mount-compact-battery-switch-without-fused](https://www.desertcart.com.au/products/17480998-20308-battery-doctor-top-mount-compact-battery-switch-without-fused)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-20*