---
product_id: 216009583
title: "KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover"
brand: "konnwei"
price: "€ 118.43"
currency: EUR
in_stock: true
reviews_count: 12
category: "Konnwei"
url: https://www.desertcart.gr/products/216009583-konnwei-kw650-6v-12v-car-battery-tester-100-2000-cca
store_origin: GR
region: Greece
---

# 100-2000 CCA load testing range >99.5% testing accuracy 6V & 12V battery compatibility KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover

**Brand:** konnwei
**Price:** € 118.43
**Availability:** ✅ In Stock

## Summary

> 🔧 Diagnose like a pro, drive with confidence — never get stranded again!

## Quick Answers

- **What is this?** KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover by konnwei
- **How much does it cost?** € 118.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/216009583-konnwei-kw650-6v-12v-car-battery-tester-100-2000-cca)

## Best For

- konnwei enthusiasts

## Why This Product

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

## Key Features

- • **Precision You Can Trust:** Powered by STM32 chip delivering lightning-fast results with over 99.5% accuracy to keep your vehicle running smoothly.
- • **Future-Proof with Updates:** Stay ahead with software update capability and multilingual support, ensuring your tester evolves with your needs.
- • **Waveform Voltage Analysis:** Exclusive one-key voltage waveform monitoring helps both beginners and pros diagnose battery and in-car system health in real-time.
- • **Comprehensive System Testing:** Beyond batteries—evaluate your alternator’s charging and starter’s cranking conditions to avoid unexpected breakdowns.
- • **Universal Battery Compatibility:** Seamlessly tests 6V & 12V batteries including AGM, gel, and flooded types for cars, boats, motorcycles, and lawn mowers.

## Overview

The KONNWEI KW650 is a versatile, high-precision automotive battery and alternator tester compatible with 6V and 12V batteries ranging from 100 to 2000 CCA. Featuring an advanced STM32 processor, it delivers over 99.5% accurate results within milliseconds, supports waveform voltage analysis for real-time diagnostics, and tests starter and alternator performance. Its intuitive color display, robust build, and software update capability make it an essential tool for vehicle owners and professionals aiming to prevent battery failures and optimize vehicle maintenance.

## Description

Buy KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover: Battery Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Fast and accurate, nice user interface, love the software update feature - I've been having some doubts about my fairly new car battery (Interstate, 700CCA) recently and wanted to make sure I test it before taking it back to the store. I am aware that batteries will lose charge if the car is not used for extended periods of time (which is my case due to WFM for months), but I was thinking that it would take much longer to a new battery to get there, maybe at least 1-1.5 months, especially in nice weather. I have been driving my car about every couple weeks or so, but mainly short drives. I thought that maybe the battery I picked did not quite happen to be the pride of Interstate product quality. Since I've wanted to own one of these battery testers for a while now, I figured that this situation would be a good time to get one, so after looking through several models to get familiar with the common feature set offer vs. cost, I settled to this Konnwei KW650, even though I was a bit reticent about the brand unknown to me. There are a bunch of these testers available, many of them offering similar if not identical feature package, even though the prices differ a lot in some cases, but the reasons that made me go for this one were the nicer processing speed and display, car starting voltage waveform capture and the software update capability. I figured that my risk would be minimal considering all the good reviews and desertcart's easy return policy. Well, I must say that I am very happy with my choice; this one is a keeper. After updating the software as soon as I received it, which was pretty easy to do BTW, I checked my battery and found that even though it was in a pretty badly discharged state, the tester showed that the battery was in very good condition and just needed a good charge. The state of health was 100% and the state of charge was shown to be only 10%. I have also tested a known weak battery I had stored until I can find the time to dispose of it. I tested it both before and after charging it, and in both cases it indicated a very low state of health and prompted replacement. I was planning to rent a professional battery tester and check the full instrument accuracy for parameters like the battery resistance, SOH, SOC, but at least from what I am seeing so far from my tests (lead-acid battery only) everything makes sense. The voltage measurement had only a small accuracy deviation of 0.06-0.1 max over a wide measurement range when verified against a professional meter, but that is meaningless for the purpose of this tester. The voltage ripple was also slightly off, but you can see some of that even when comparing more expensive equipment. The min/max voltage captures during engine start were also reasonably accurate. Considering the cost and intended purpose of the device, I believe that it is more than adequate for the job, and in my opinion, paying any more for a known brand would not be justified from the performance stand point. At least not for my home garage use. In terms of workmanship, I have nothing to object: It comes in a nicely looking plastic case, light weight and just the right size to hold with one hand, clear color graphic display with an easy and intuitive user interface. It has thick yet reasonably flexible 38 inch cable to protect the 4-wire Kelvin test leads, with solid connections to the battery connection clamps. I wish the cable were just a bit longer to reach the vehicle cabin when performing some of the tests more comfortably from the inside, like the car charging system. Not a deal breaker, because these tests are still easy to accomplish, but it would have been more comfortable that way. Now the one feature I was hoping to have on this device, was to be able to factor in the battery temperature into the CCA measurement and SOC calculation, as temperature is a huge factor in battery performance. Again, not a deal breaker at this price for me, but since most higher end devices can compensate for temperature, I believe that it would be a great feature addition and a cheap way to gain an edge over the competition. I wouldn't expect the addition of a battery post temp probe/sensor (although I would actually pay for the cost difference) but at least by manually entering the batt. temperature during battery test setup. Since the software can be updated online, I am hoping that this feature can be added later, and perhaps along with some other good things in the future. Who knows, maybe Konnwei is listening.
Review: Saves money when you have a lot of vehicle/lawn equipment batteries - Simple to use and gets the job done. Wanted something that was not overpriced, with good features and the ability to test a variety of batteries, alternator, and starter condition. After using this on several vehicles and batteries I have learned how the resistance of the battery and expected life of battery work. The feature for running voltage and ripple current graph have become very handy during load test. The starter crank test and time have helped find two starters that needed to be replaced. The screen is easy to read, menu functions are simple to navigate, and battery clamps / wire are of good quality.

## Features

- 【6 & 12 Volts Battery Tester】 As the upgraded version of KW600, KW650 can test all 6V and 12V 100-2000CCA batteries including regular flooded, AGM flat plate, AGM spiral, or gel batteries. The perfect automotive battery testers to diagnose the batteries of car, boat, lawn mowers, etc. Perfect household tool and present for daily use! NEW REPLACEMENT AVAILABLE FOR ANY QUALITY ISSUE.
- 【One-key Waveform Analysis】The exclusive function on KW650 battery analyzer is the voltage waveform analysis, for the beginners, it helps to track the real-time voltage changing to find the battery issue, for the professional repair store, it’s continuous voltage monitoring results can be uploaded to computer then compare it to achieve the analysis of in-car systems.
- 【 >99.5% Accuracy】Thanks to KW650’s powerful STM-32 chip, it provides more than 99.5% precise testing reports within milliseconds, greatly improved the testing speed compared to other battery testers. Besides KW650 is one of the few automotive battery and alternator testers that supports UPDATE function.
- 【Display Overall Batteries Data】Except give you the basic battery parameters such as voltage, internal resistance, cold cranking amp, battery health and charge status, KW650 load tester will also give professional advice based on these data then you can decide whether to replace or charge the battery, help you know battery status in advance to prevent possible battery failures.
- 【Starter& Alternator Tester】KW650 is not only a great battery load tester that tests batteries cranking & charging system but also can test alternator's charging and starter's cranking conditions. And it can switch up to 12 languages for different needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B088CP8VPC |
| Best Sellers Rank | #748,618 in Automotive ( See Top 100 in Automotive ) #418 in Battery Testers |
| Brand | KONNWEI |
| Brand Name | KONNWEI |
| Color | KW650 |
| Compatible Devices | car, boat, motorcycle, lawn mower |
| Customer Reviews | 4.5 out of 5 stars 514 Reviews |
| Included Components | STM32 |
| Item Dimensions | 0.79 x 2.76 x 4.92 inches |
| Item dimensions L x W x H | 0.79 x 2.76 x 4.92 inches |
| Manufacturer | KONNWEI |
| Measurement Type | Voltmeter, Ammeter |
| Min. Operating Voltage | 8 volts |
| Minimum Operating Voltage | 8 volts |
| Model | KW650 |
| Number of Items | 1 |
| Part Number | KW650 |
| Power Source | Battery Powered |
| Specification Met | [Cautious] Shenzhen Jiawei Hengxin Technology Co., Ltd. Internal Certifications Or Quality Standards |
| Style | Voltage Tester |
| Style Name | Voltage Tester |
| Upper Temperature Rating | 70 °C |

## Product Details

- **Brand:** KONNWEI
- **Color:** KW650
- **Item dimensions L x W x H:** 0.79 x 2.76 x 4.92 inches
- **Power Source:** Battery Powered
- **Style:** Voltage Tester

## Images

![KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover - Image 1](https://m.media-amazon.com/images/I/61bSGT6eseS.jpg)
![KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover - Image 2](https://m.media-amazon.com/images/I/613apOMxy5L.jpg)
![KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover - Image 3](https://m.media-amazon.com/images/I/71lHyuk6UcL.jpg)
![KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover - Image 4](https://m.media-amazon.com/images/I/71F9Qf9RPoL.jpg)
![KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover - Image 5](https://m.media-amazon.com/images/I/61xGIUUspyL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fast and accurate, nice user interface, love the software update feature
*by L***M on November 9, 2020*

I've been having some doubts about my fairly new car battery (Interstate, 700CCA) recently and wanted to make sure I test it before taking it back to the store. I am aware that batteries will lose charge if the car is not used for extended periods of time (which is my case due to WFM for months), but I was thinking that it would take much longer to a new battery to get there, maybe at least 1-1.5 months, especially in nice weather. I have been driving my car about every couple weeks or so, but mainly short drives. I thought that maybe the battery I picked did not quite happen to be the pride of Interstate product quality. Since I've wanted to own one of these battery testers for a while now, I figured that this situation would be a good time to get one, so after looking through several models to get familiar with the common feature set offer vs. cost, I settled to this Konnwei KW650, even though I was a bit reticent about the brand unknown to me. There are a bunch of these testers available, many of them offering similar if not identical feature package, even though the prices differ a lot in some cases, but the reasons that made me go for this one were the nicer processing speed and display, car starting voltage waveform capture and the software update capability. I figured that my risk would be minimal considering all the good reviews and Amazon's easy return policy. Well, I must say that I am very happy with my choice; this one is a keeper. After updating the software as soon as I received it, which was pretty easy to do BTW, I checked my battery and found that even though it was in a pretty badly discharged state, the tester showed that the battery was in very good condition and just needed a good charge. The state of health was 100% and the state of charge was shown to be only 10%. I have also tested a known weak battery I had stored until I can find the time to dispose of it. I tested it both before and after charging it, and in both cases it indicated a very low state of health and prompted replacement. I was planning to rent a professional battery tester and check the full instrument accuracy for parameters like the battery resistance, SOH, SOC, but at least from what I am seeing so far from my tests (lead-acid battery only) everything makes sense. The voltage measurement had only a small accuracy deviation of 0.06-0.1 max over a wide measurement range when verified against a professional meter, but that is meaningless for the purpose of this tester. The voltage ripple was also slightly off, but you can see some of that even when comparing more expensive equipment. The min/max voltage captures during engine start were also reasonably accurate. Considering the cost and intended purpose of the device, I believe that it is more than adequate for the job, and in my opinion, paying any more for a known brand would not be justified from the performance stand point. At least not for my home garage use. In terms of workmanship, I have nothing to object: It comes in a nicely looking plastic case, light weight and just the right size to hold with one hand, clear color graphic display with an easy and intuitive user interface. It has thick yet reasonably flexible 38 inch cable to protect the 4-wire Kelvin test leads, with solid connections to the battery connection clamps. I wish the cable were just a bit longer to reach the vehicle cabin when performing some of the tests more comfortably from the inside, like the car charging system. Not a deal breaker, because these tests are still easy to accomplish, but it would have been more comfortable that way. Now the one feature I was hoping to have on this device, was to be able to factor in the battery temperature into the CCA measurement and SOC calculation, as temperature is a huge factor in battery performance. Again, not a deal breaker at this price for me, but since most higher end devices can compensate for temperature, I believe that it would be a great feature addition and a cheap way to gain an edge over the competition. I wouldn't expect the addition of a battery post temp probe/sensor (although I would actually pay for the cost difference) but at least by manually entering the batt. temperature during battery test setup. Since the software can be updated online, I am hoping that this feature can be added later, and perhaps along with some other good things in the future. Who knows, maybe Konnwei is listening.

### ⭐⭐⭐⭐⭐ Saves money when you have a lot of vehicle/lawn equipment batteries
*by P***K on January 27, 2025*

Simple to use and gets the job done. Wanted something that was not overpriced, with good features and the ability to test a variety of batteries, alternator, and starter condition. After using this on several vehicles and batteries I have learned how the resistance of the battery and expected life of battery work. The feature for running voltage and ripple current graph have become very handy during load test. The starter crank test and time have helped find two starters that needed to be replaced. The screen is easy to read, menu functions are simple to navigate, and battery clamps / wire are of good quality.

### ⭐⭐⭐⭐ Works great for 12v car batteries, hard to select correct 6v battery type
*by S***1 on January 15, 2021*

I got the Konnwei KW650 6v and 12v battery tester because I wanted to not just test 12v batteries but also test 6v batteries. Being able to also do a cranking and charging test was a bonus. Operation for the 12v car batteries is straight forward and all went well. I would give 5 stars for the 12v functionality. Usage for testing motorcycle/6v batteries is not covered by the user manual. You need to select your battery type from a long list of very cryptic battery codes, none of which were on my battery. I ended up doing an internet search to find a list of these codes and then estimated which code might be closest to matching the specs for my battery. Because of this I give only 3 stars for usage with 6v batteries. Overall I give it 4 stars as most of my usage will be with 12v batteries.

## Frequently Bought Together

- KONNWEI KW650 6V 12V Car Battery Tester, 100-2000 CCA Battery Load Tester Automotive Battery and Alternator Tester for Vehicles/Marine/Motorcycle/Lawn Mover
- KONNWEI KW208 12V Car Battery Tester, 100-2000 CCA Load Tester Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Truck Marine Motorcycle SUV Boat
- KONNWEI KW850 Professional OBD2 Scanner Auto Code Reader Diagnostic Check Engine Light Scan Tool for OBD II Cars After 1996(Original)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.gr/products/216009583-konnwei-kw650-6v-12v-car-battery-tester-100-2000-cca](https://www.desertcart.gr/products/216009583-konnwei-kw650-6v-12v-car-battery-tester-100-2000-cca)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-12*