---
product_id: 118662093
title: "Lisle 24550 Computer Safe Circuit Tester, One Size, Factory"
brand: "lisle"
price: "€ 47.87"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/118662093-lisle-24550-computer-safe-circuit-tester-one-size-factory
store_origin: NL
region: Netherlands
---

# Draws <21mA at 12V Operates 3-28V DC range Polarity indicated by red/green lights Lisle 24550 Computer Safe Circuit Tester, One Size, Factory

**Brand:** lisle
**Price:** € 47.87
**Availability:** ✅ In Stock

## Summary

> 🔧 Test Smarter, Not Harder – Protect Your Ride with Precision!

## Quick Answers

- **What is this?** Lisle 24550 Computer Safe Circuit Tester, One Size, Factory by lisle
- **How much does it cost?** € 47.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/118662093-lisle-24550-computer-safe-circuit-tester-one-size-factory)

## Best For

- lisle enthusiasts

## Why This Product

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

## Key Features

- • **Low Power Draw:** Consumes less than 21mA at 12 volts, preserving battery life during testing.
- • **Compact & Lightweight:** Slim 6.86 x 2.03 x 14.99 cm design weighing just 68 grams for easy portability.
- • **Instant Polarity Feedback:** Red and green LED indicators provide clear, immediate polarity detection.
- • **Wide Voltage Compatibility:** Operates seamlessly across a broad 3-28 volts DC range for versatile use.
- • **Ultra-Safe for Modern Electronics:** Engineered to protect sensitive automotive computers from damage.

## Overview

The Lisle 24550 Computer Safe Circuit Tester is a precision electric testing device designed specifically for automotive use. It safely tests circuits without risking damage to sensitive vehicle computers, operating efficiently within a 3-28 volt DC range while drawing minimal current. Featuring clear red and green LED polarity indicators, this compact and lightweight tool ensures accurate diagnostics and peace of mind for professional and DIY mechanics alike.

## Description

Also Indicates Polarity. SUPERSEDES 27450 Safe for automotive computers. Won’t damage sensitive electronic components. Draws less than 21 mA. at 12 volts DC. Operating range 3-28 volts. The red light indicates positive polarity, green indicates negative polarity.

## Features

- Safe for automotive computers. Won’t damage sensitive electronic components.
- Item Package Dimension: 10.51L x 4.25W x 1.46H inches
- Item Package Weight - 0.2 Pounds
- Item Package Quantity - 1
- Product Type - ELECTRIC CIRCUIT TESTING DEVICE

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Lisle |
| Brand | Lisle |
| Product Dimensions | 6.86 x 2.03 x 14.99 cm; 68.04 g |
| Item model number | 24550 |
| Manufacturer part number | 24550 |
| OEM Part Number | 24550 |
| Voltage | 12 Volts |
| Item Weight | 68 g |

## Product Details

- **Brand:** Lisle
- **Power source:** Battery Powered
- **Style:** Computer Safe Circuit Tester
- **Colour:** Green,Red
- **Item weight:** 0.15 Pounds

## Images

![Lisle 24550 Computer Safe Circuit Tester, One Size, Factory - Image 1](https://m.media-amazon.com/images/I/41sQ2fmnMwL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this item good at finding shorts circuits ?  Thank you**
A: It is an excellent product to use on automotive to find continuity (i.e., there is a closed loop or not).  Short circuit is when there is infinite current flowing through the component but zero voltage across.  A multi-meter would do this job as well.

**Q: My test light bus only showing negative reading only.**
A: The clap needs to be on the neg.

**Q: How is it different than a multi tester?**
A: It only displays volts. So it’s a Voltmeter, and a test light.

**Q: How would this do testing a motherboard out?**
A: I guess u are asking about a possible  circuit  board,  if theis is the question  then I suggest  u use a multimeter,  for lower electrical  needs , yes it says possible  for testing  out ecm, but I won't take that chance to costly. Now to test on the voltage  range it says I would be likely  to use it , now if your asking about your boat motor I would think for the voltage  range that it's listed  on the tester or what the seller recommends,  I myself  will not use this on a circuit board,  if u want to risk it that's your $ , not mine

## Frequently Bought Together

- Lisle 24550 Computer Safe Circuit Tester, One Size, Factory
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- Test Light Automotive,Circuit Tester 6V-12V-24V,ABS Handle Material,Long Steel Probe Coating PU and Alligator Clip, for Continuity Voltage, for Sedan, SUV, RV, Truck (Black,1-Pack)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-24*