---
product_id: 538081078
title: "Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery"
brand: "kaiweets"
price: "€ 40.54"
currency: EUR
in_stock: true
reviews_count: 13
category: "Kaiweets"
url: https://www.desertcart.hr/products/538081078-smart-circuit-tester-0-8v-100v-dc-voltage-tester-backlight
store_origin: HR
region: Croatia
---

# 0.8-100V DC range Bright green LED backlight Large alligator clip for one-hand use Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery

**Brand:** kaiweets
**Price:** € 40.54
**Availability:** ✅ In Stock

## Summary

> ⚡ Test Smarter, Not Harder — The Ultimate Automotive Circuit Sidekick

## Quick Answers

- **What is this?** Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery by kaiweets
- **How much does it cost?** € 40.54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/538081078-smart-circuit-tester-0-8v-100v-dc-voltage-tester-backlight)

## Best For

- kaiweets enthusiasts

## Why This Product

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

## Key Features

- • **Smart Auto-Detection:** Automatically identifies AC/DC voltage, polarity, resistance & continuity for seamless testing.
- • **Extended Voltage Range:** Tests up to 100V DC—over 60% higher than typical testers—covering all your automotive circuits.
- • **Ultra-Visible LED Display:** Clear green backlight ensures precise readings day or night, eliminating guesswork.
- • **Durability Meets Confidence:** 3-year warranty plus lifetime tech support means this tester is built to last and back you up.
- • **Ergonomic One-Hand Operation:** Large alligator clip and 78.7-inch spring wire maximize flexibility and efficiency on the job.

## Overview

The KAIWEETS Smart Circuit Tester VT501 is a compact, battery-powered digital voltmeter designed for automotive professionals and enthusiasts. It features a wide 0.8-100V DC testing range, smart auto-detection of voltage type and polarity, and a bright green LED backlit display for clear readings in any lighting. Equipped with a durable 78.7-inch spring wire and large alligator clip, it enables efficient one-handed operation. Safety is enhanced with a thick probe guard and copper-nickel plated probes. Backed by a 3-year warranty and lifetime support, it’s a reliable tool for fast, precise automotive electrical diagnostics.

## Description

Product Description Long Copper-Nickel Plating Probe The Copper-Nickel Plating Probe provides good electrical conductivity and the 1.65" probe ensures an effective safety distance to prevent the risk of electric shock. Large-Sized Alligator Clip A Large-Sized Alligator Clip to ensure that you can clip any object you want to test while facilitating you to be able to operate one-handed to improve efficiency. Thick Probe Cap A Thick Probe Cap protects you from accidental probe punctures while helpingto make the spring wire easy to carry. Bright Digital Display Features a clear and bright green backlight LED digital display that provides accurate volt readouts, guaranteed to be clearly visible in both bright and dim environment.

Review: Great little simple tester - This has been a good tool so far. Sometimes you can’t do a job with a multimeter easily and these pen meters while basic get the job done Readings seem accurate when tested against a known meter This often gets taken from the draw first as it’s so simple and fast to use for work on machines. Continuity beep good and loud for use in noisy workshops My second Kaiweets product and they offer great value
Review: Perfectly fine and easy to use. - Perfect. A fuse blew in my BMW over the winter due to some frozen windows. Rather that take it to a garage I did some research a figured out the fuse was the problem. It was not easy identifying the fuse and I did not want to take them all out sone at a time. Porsche c this and it allowed me to identify the fuse within 5 minutes. Money definitely well spent.

## Features

- 【Smart Mode】The digital automotive tester defaults to SMART mode. In the SMART mode, the meter can automatically measure and identify the AC/DC voltage, polarity, resistance, and continuity. It can automatically detect the measurement content and choose the optimal range for the highest precision, eliminating the need for any additional operations on your part!
- 【Wider Voltage Range】The smart automotive circuit tester with 0.8-100V DC voltage testing range, perfect for examining different electrical circuits in vehicles. Our upgraded technology allows for measuring a maximum voltage of 100V, surpassing the typical 60V maximum voltage capability of other auto electrical testers available on the market.
- 【Wide Usage & User-friendly】The digital test light allows for the fast test of automotive headlights, taillights, turn signal circuits, fuse connections, faulty sockets, as well as other 0.8-100V DC wirings and circuits. The premium 78.74-inch long PU spring wire provides flexibility and durability compared to standard cable wires and offers convenient use and storage. It features a large-sized alligator clip for effortless one-hand operation, ensuring improved working efficiency.
- 【Precise LED Digital Display & Probe Guard Protection】The automotive circuit tester features a clear and bright green backlight LED digital display that provides accurate volt readouts. It offers a 0.1V resolution ratio with high accuracy. In comparison to LCD displays, the green LED reading display is guaranteed to be clear and visible both during the day and at night. Features a thick probe guard to protect you from accidental stab wounds while helping make the spring wire easy to carry.
- 【3-Year After-Sales Service】If durability is what you seek in a circuit testing tool, look no further. we offer a 3-year after-sales service and lifetime technical assistance. If you have any inquiries, please don't hesitate to contact us.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C4TJ6VQC |
| Best Sellers Rank | 26,527 in DIY & Tools ( See Top 100 in DIY & Tools ) 26 in Circuit Testers |
| Brand | KAIWEETS |
| Colour | Black |
| Compatible Devices | Vehicles with 0.8-100V DC wirings and circuits |
| Country Of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 2,151 Reviews |
| EU Spare Part Availability Duration | 3 Years |
| Included Components | manual |
| Item Dimensions | 21.6 x 5.7 x 4.4 centimetres |
| Item Weight | 0.15 Kilograms |
| Item dimensions L x W x H | 21.6 x 5.7 x 4.4 centimetres |
| Item weight | 0.15 Kilograms |
| Manufacturer | KAIWEETS |
| Manufacturer Part Number | VT501 |
| Maximum Operating Voltage | 100 Volts |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 0.8 Volts |
| Model Number | VT501 |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Style | Compact |
| Style Name | Compact |

## Product Details

- **Brand:** KAIWEETS
- **Power source:** Battery Powered
- **Style:** Compact
- **Item weight:** 0.15 Kilograms
- **Item dimensions L x W x H:** 21.6 x 5.7 x 4.4 centimetres

## Images

![Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery - Image 1](https://m.media-amazon.com/images/I/71F1co-MTBL.jpg)
![Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery - Image 2](https://m.media-amazon.com/images/I/81oDzQ82kDL.jpg)
![Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery - Image 3](https://m.media-amazon.com/images/I/81gxDxMv84L.jpg)
![Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery - Image 4](https://m.media-amazon.com/images/I/81P+lvqtPpL.jpg)
![Smart Circuit Tester, 0.8V-100V DC Voltage Tester with Backlight, Digital Test Light with Flashlight Measures Polarity Continuity, Automotive Fuse Tester for Car Battery - Image 5](https://m.media-amazon.com/images/I/81u8jMqKiaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great little simple tester
*by J***. on 23 June 2026*

This has been a good tool so far. Sometimes you can’t do a job with a multimeter easily and these pen meters while basic get the job done Readings seem accurate when tested against a known meter This often gets taken from the draw first as it’s so simple and fast to use for work on machines. Continuity beep good and loud for use in noisy workshops My second Kaiweets product and they offer great value

### ⭐⭐⭐⭐⭐ Perfectly fine and easy to use.
*by A***N on 25 March 2026*

Perfect. A fuse blew in my BMW over the winter due to some frozen windows. Rather that take it to a garage I did some research a figured out the fuse was the problem. It was not easy identifying the fuse and I did not want to take them all out sone at a time. Porsche c this and it allowed me to identify the fuse within 5 minutes. Money definitely well spent.

### ⭐⭐⭐⭐ A 5* product let down by a stupid mistake.
*by G***R on 16 April 2025*

This is clearly a quality bit of kit, and is supplied at a great price. The unit comes in a small but perfectly sized zip case, and is very straightforward to use once you know what you’re doing. However, that comes with a big “But”, for which I have deducted a star. The small Instruction booklet lists several languages in the Contents Page, with English at the beginning. However, my copy inexplicably started at page 9 meaning there were no English instructions! Thankfully, I was able to find them on the internet, and I quickly downloaded them. A 5* product let down by a stupid mistake.

## Frequently Bought Together

- KAIWEETS 0.8V-100V DC Smart Automotive Test Light, Buzzer Circuit Tester with Sharp Probe, Bidirectional Voltage Tester with Flashlight, Electric Test Pen for Car Battery Polarity Continuity Fuses
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- LZLINYJLONG Relay Puller Pliers Relay and Fuse Remover Tool, Automotive Relay FMM Fuses Puller Tool, Car Vehicle Battery Terminal Wiper Remover

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**Shop now:** [https://www.desertcart.hr/products/538081078-smart-circuit-tester-0-8v-100v-dc-voltage-tester-backlight](https://www.desertcart.hr/products/538081078-smart-circuit-tester-0-8v-100v-dc-voltage-tester-backlight)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-03*