Battery Doctor 20138 Battery Disconnect Knife Switch for Top Post Terminal – 12v Battery Kill Switch for Negative Post – Perfect for Saving Car Battery - Made In USA - Image 1

£41.14

WirthCo Battery Doctor 20138 Battery Disconnect Knife Switch for Top Post Terminal – 12v Battery Kill Switch for Negative Post – Perfect for Saving Car Battery - Made In USA

Name: Battery Doctor 20138 Battery Disconnect Knife Switch for Top Post Terminal - 12v Battery Kill Switch for Negative Post - Perfect for Saving Car Battery - Made In USA
Brand: WirthCo
Price: 41.14 GBP
Availability: InStock

Bronze, 20138

Blower Motor Fan Resistors

About as cheap as it gets. The only time it was cheaper was 2 months ago.

£41 today · all-time low £41 (Mar 2026) · usually the usual

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Price History & Forecast

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Last 49 days • 49 data points (No recent data available)

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Price Distribution

Price distribution over 49 days • 2 price levels

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Most common price: £41 (38 days, 77.6%)

Price range: £41 - £45

Price levels: 2 different prices over 49 days

Description

Stop unwanted parasitic power draw with our patented Battery Disconnect Knife Switches. It is perfect for mounting on a negative battery post to disconnect the ground and battery. Easy to install and use. A fast and effective way to extend the life of your batteries. Great for cars, RV, ATV, UTV, trucks, boats, campers, and other power disconnect purposes.

Key Features

INCREASED SAFETY: Prevent vehicle theft. Shut down power during maintenance and avoid electrical fires

EASY TO USE: Lift the knife and cut off power. Works on standard 5/8" top terminal

COMPATIBLE: Use on cars, RV, ATV, UTV, trucks, boats, campers, and other power disconnect purposes

TOP QUALITY: Made in the USA. 250 amps continuous and 750 amps surge at 12 volts. 3"W x 4"L x 2"H

International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

Product Specifications

Brand: WirthCo
Model: 20138
Colour: Bronze
Size: 2"
ASIN: B000CQBND0
Category: Automotive > Car Parts > Engine & Engine Parts > Cooling & Heating Systems > AC & Interior Heating > Blower Motor Fan Resistors
Domain: Amazon UK
Release Date: 02 November 2025
Listed Since: 06 August 2012

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WirthCo Battery Doctor 20138 Battery Disconnect Knife Switch for Top Post Terminal – 12v Battery Kill Switch for Negative Post – Perfect for Saving Car Battery - Made In USA

About as cheap as it gets. The only time it was cheaper was 2 months ago.

Price History & Forecast

Price Distribution

Price Analysis

Description

Key Features

Product Specifications

Barcode

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