---
product_id: 278506336
title: "KONNWEI 3 in 1 Car Battery Charger, KW510 Battery Tester 12V 5-Amp Fully Automatic Smart Charger Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator w/Temp Compensation"
brand: "konnwei"
price: "$124.77"
currency: USD
in_stock: true
reviews_count: 13
category: "Konnwei"
url: https://www.desertcart.us/products/278506336-konnwei-3-in-1-car-battery-charger-kw510-battery-tester
store_origin: US
region: United States of America
---

# 5A Fast Charging Output 3-in-1 Charger & Tester 8 Safety Protections KONNWEI 3 in 1 Car Battery Charger, KW510 Battery Tester 12V 5-Amp Fully Automatic Smart Charger Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator w/Temp Compensation

**Brand:** konnwei
**Price:** $124.77
**Availability:** ✅ In Stock

## Summary

> 🔌 Power Up Smarter: The Ultimate 3-in-1 Battery Lifesaver

## Quick Answers

- **What is this?** KONNWEI 3 in 1 Car Battery Charger, KW510 Battery Tester 12V 5-Amp Fully Automatic Smart Charger Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator w/Temp Compensation by konnwei
- **How much does it cost?** $124.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/278506336-konnwei-3-in-1-car-battery-charger-kw510-battery-tester)

## 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

- • **All-in-One Powerhouse:** Test, charge, and repair your 12V lead-acid batteries with one sleek device.
- • **Revive & Restore Tech:** Advanced pulse repair reverses sulfation to extend battery life and performance.
- • **Universal Compatibility:** Works flawlessly with flooded, AGM, gel, and lithium-ion 12V batteries across vehicles.
- • **Safety-First Smart Charging:** 8 layers of protection including reverse polarity & overheat guard for worry-free use.
- • **Precision Battery Health Insights:** Instantly analyze voltage, internal resistance & CCA for confident battery decisions.

## Overview

The KONNWEI KW510 is a professional-grade 3-in-1 battery charger, tester, and maintainer designed for all 12V lead-acid batteries. Featuring a large color LCD, it delivers precise battery health diagnostics including voltage, internal resistance, and cold cranking amps. With a max 5A output, it charges batteries as low as 2V and incorporates advanced pulse repair technology to rejuvenate sulfated batteries. Compatible with cars, boats, lawnmowers, and more, it prioritizes safety with 8 built-in protections, making it an essential tool for proactive battery care and maintenance.

## Description

Product description KONNWEI KW510 Powerful 3 in 1 Multifunctional Car Battery Charger, Repair and Test Tool for All Types 12V Lead-acid Batteries Why do you need to know battery conditions (Good or Recharge)? WARNING The battery cca tester never discharges or drain the battery. - If there are abnormal test results, maybe your battery is overcharged or incompletely charged. So the battery will be damaged or its life will be greatly shortened, then you can take action to deal with this issue. Know the battery status in advance to prevent the annoying battery failure situations. Plug and play--input the rated battery capacity, KW510 will start analyzing the battery's CCA value, charge (%), voltage (v), internal resistance (Ω), rated CCA, battery healthy (%) and display the test result on screen within seconds. Provide 5 kinds of professional advice accordingly GOOD BATTERY: The battery is without any problem, use it without worries! GOOD, RECHARGE: Good battery but low current, recharge before using. REPLACE: The battery is already or near to reach the end of the using life, please replace the battery. BAD CELL, REPLACE: Battery interior damaged, bad cell or short circuit, replace the battery. CHARGE-RETEST: Unstable battery shall be recharged and retested to avoid error. ACCURATE RESULTS High precision amplifier and calibrated by professional instruments give you the reliable results in seconds! CRANKING & CHARGING TEST CRANKING TEST : Analyzes the actual cranking voltage and the cranking time to help you quickly figure out the whole state of the starting system; CHARGING TEST : Test different parts of charging system, including generator, rectifier, rectifier diode, and so on for a reliable charging volt value. CONVENIENT TESTING SITUATION No matter the batteries in the vehicles or out of the vehicles, KW510 will finish its testing job excellently, pocketed size let you can bring it to anywhere you want. FITS FOR MOST VEHICLES Input Voltage: 100-230V AC, 50-60Hz Rated output: 12V 5A Output voltage: DC 13.8V Battery range: 12V 4Ah-100Ah Dimensions: 6.3” x 3.7” x 2.4” Item Weight: 1.43 pounds Designed for testing and charging 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries. Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more. PACKAGE INCLUDES 1 x KW510 Smart Battery Charger 1 x Charging Cable 1 x User Manual AUTOMATIC FAST CHARGING Max output 12-volt 5-amp, input 100-230-volt, charge dead batteries as low as 2-volt. Automatic monitoring of the entire charging process through a microprocessor-controlled program. Auto change into low current mode after fully charged. ENHANCED PULSE REPAIR Automatic sulfating and acid stratification detection, the advanced repair mode can repair and reverse the damaging effects when batteries are left uncharged for extended periods to improve battery performance and longevity. (Note: The pulse repair function can only be used when the car battery is disconnected from the car.) MULTIPLE PROTECTION Short circuit / Overcurrent protection / Overheat protection / Fireproof material / Low pressure protection / Overpressure protection / Mislink protection / Electrification protection ) the charger will automatically turn off the power supply to protect the battery and charger.

Review: Just received, impressed, already saved me from a big mistake. - Had a car and ended up replacing with a new battery. The new battery also went dead and I discovered that my trunk light was on and would drain the battery in a couple days sitting. Was going to return the battery I replaced for the $ 10 core charge but bought a battery charger with a repair function and run that on the old battery. Didn't have a load tester and my neighbor was always going to check it but never did. So I ordered this arrived in three days. Checked the battery and the battery was good. Tester said to recharge but the battery only took less than half an hour to charge fully probably because it was already holding its charged. Got a little confused but am impressed that it tests to the battery cca its rated at. Originally wasn't sure whether to set at 1000 or 800 but finally figured out cca means cold cranking amps and set it right. Screen is clear easy to read and the only thing I regret is buying that other charger with repair. This also has repair it pulses a little slower maybe there is a reason but it works somewhat like the other. So for $20 more I now have a good tester and the battery charger combined and don't have to switch. Only drawback I found was that the clamps take some finesse to clamp to a side battery that doesn't have posts but you can get it done. I now have a $ 100 battery I can use in something else rather than a $ 10 core charge so this thing paid for itself in my first try.
Review: Great Device - ****UPDATE*** This charger saved me already around $45.00 My lawnmower tractor battery was completely dead and upon checking / testing the recommendation was to replace it due to bad cell. Then I remained myself that I had purchased Konnwei which was sitting in a trunk of my car.,,,to my surprise this little device repaired bad cell and recharged the battery in less than 5 hours. It already paid for itself !!!!! and tractor starts instantly..... THANKS AGAIN ..... Needed the AGM battery charger/maintainer because my old charger is only good for regular acid batteries. Glad I found KW 510- it is a tester as well. I tested few different vehicle batteries and their charging systems. One battery needed re-charging, which was no problem for this device. Tested again and although voltage is there cranking amps are well below (367 out of 800). I left the charger ON for Trickle/charging/maintaining, to my surprise I am able to start it OK even thought CA are less than half of new working battery. Repair feature did not help resolve the issue, well battery is 5 years old but rarely used-that is what most likely killed it as well. When I get new one I will leave it connected so it can be gently maintained/trickled with very low amps. Time will show how the unit performs, but as of now I am happy and can recommend it.

## Features

- 【All-in-one Battery Charger】KONNWEI KW510 is a professional 3 in 1 battery tester, battery charger, battery maintainer(pulse repair), trickle charger and battery desulfator. The large color LCD display and button-operated features will be more convenient compared to other similar products. Perfect Gift for holidays!
- 【Accurate Battery Tester】running for years but no idea about battery status? KW510 12v battery tester provides you an overall analysis of battery health by checking its voltage charge, internal resistance then tells you whether the battery needs to be recharged. Also this battery tester runs cranking and charging system test and car alternator tester charging.
- 【Fully Automatic Battery Charger】charge batteries as low as 2-volt, max output 12-volt 5-amp. KW510 battery charger not only helps you charge the batteries but also adapts the newest pulse repair technology, one-click repair and automatically detects battery sulfation and acid stratification to bring the batteries back to life and restore their performance.
- 【Universal Compatible】KW510 can test, charge and repair all 12-volt 100-2000CCA lead-acid batteries including regular flooded, AGM flat plate, AGM spiral, or gel batteries. The perfect automotive battery tester to diagnose the batteries of cars, boats, lawnmowers, etc.
- 【Highest Safety Priority】safety charging is the most important thing! Except the smart temp compensation that fits all climates and auto change to low current mode after fully charged, KW510 also supports up to 8 kinds of protection like reverse polarity, overload, over-current, overheat, cooling system, fireproof material, short circuit protection, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08N52DKC9 |
| Best Sellers Rank | #175,342 in Automotive ( See Top 100 in Automotive ) #631 in Battery Chargers |
| Brand | KONNWEI |
| Brand Name | KONNWEI |
| Color | Yellow |
| Compatible Devices | Cars, boats, lawnmowers, etc. |
| Customer Reviews | 4.3 out of 5 stars 745 Reviews |
| Item Dimensions | 6.3 x 3.7 x 2.4 inches |
| Item Weight | 1.43 Pounds |
| Item dimensions L x W x H | 6.3 x 3.7 x 2.4 inches |
| Manufacturer | KONNWEI |
| Measurement Type | Voltmeter, Ohmmeter |
| Min. Operating Voltage | 12 Volts |
| Minimum Operating Voltage | 12 Volts |
| Model | KW510 |
| Part Number | KW510 |
| Power Source | Battery Powered |
| UPC | 657419949613 657419949682 |
| Unit Count | 1.0 Count |
| Warranty Description | 2 years |

## Product Details

- **Brand:** KONNWEI
- **Color:** Yellow
- **Item Weight:** 1.4 Pounds
- **Item dimensions L x W x H:** 6.3 x 3.7 x 2.4 inches
- **Power Source:** Battery Powered

## Images

![KONNWEI 3 in 1 Car Battery Charger, KW510 Battery Tester 12V 5-Amp Fully Automatic Smart Charger Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator w/Temp Compensation - Image 1](https://m.media-amazon.com/images/I/61Ao8HNb+BL.jpg)

## Questions & Answers

**Q: Made in China?**
A: Yessir

**Q: What is the recommended number of hours to repair a deep cycle battery?**
A: It's based on your battery's capacity, such as AH. if the deep cycle battery's AH is 50AH. the KW510 maximum output will be 5A, and it will take 10 hours for recommended charging time. AH= A * Time

**Q: Is it a portable charger?**
A: Yes, KW510 is a portable charger, the smart charger's Dimensions: 6.3” x 3.7” x 2.4”
Item Weight: 1.43 pounds

**Q: Anyone know of a charger with all the features of this that also actually "maintains"? This one doesn't. The longest you can charge is 48 hours max**
A: I was an auto trickel changer.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Just received, impressed, already saved me from a big mistake.
*by P***A on May 17, 2021*

Had a car and ended up replacing with a new battery. The new battery also went dead and I discovered that my trunk light was on and would drain the battery in a couple days sitting. Was going to return the battery I replaced for the $ 10 core charge but bought a battery charger with a repair function and run that on the old battery. Didn't have a load tester and my neighbor was always going to check it but never did. So I ordered this arrived in three days. Checked the battery and the battery was good. Tester said to recharge but the battery only took less than half an hour to charge fully probably because it was already holding its charged. Got a little confused but am impressed that it tests to the battery cca its rated at. Originally wasn't sure whether to set at 1000 or 800 but finally figured out cca means cold cranking amps and set it right. Screen is clear easy to read and the only thing I regret is buying that other charger with repair. This also has repair it pulses a little slower maybe there is a reason but it works somewhat like the other. So for $20 more I now have a good tester and the battery charger combined and don't have to switch. Only drawback I found was that the clamps take some finesse to clamp to a side battery that doesn't have posts but you can get it done. I now have a $ 100 battery I can use in something else rather than a $ 10 core charge so this thing paid for itself in my first try.

### ⭐⭐⭐⭐⭐ Great Device
*by D***D on April 2, 2021*

****UPDATE*** This charger saved me already around $45.00 My lawnmower tractor battery was completely dead and upon checking / testing the recommendation was to replace it due to bad cell. Then I remained myself that I had purchased Konnwei which was sitting in a trunk of my car.,,,to my surprise this little device repaired bad cell and recharged the battery in less than 5 hours. It already paid for itself !!!!! and tractor starts instantly..... THANKS AGAIN ..... Needed the AGM battery charger/maintainer because my old charger is only good for regular acid batteries. Glad I found KW 510- it is a tester as well. I tested few different vehicle batteries and their charging systems. One battery needed re-charging, which was no problem for this device. Tested again and although voltage is there cranking amps are well below (367 out of 800). I left the charger ON for Trickle/charging/maintaining, to my surprise I am able to start it OK even thought CA are less than half of new working battery. Repair feature did not help resolve the issue, well battery is 5 years old but rarely used-that is what most likely killed it as well. When I get new one I will leave it connected so it can be gently maintained/trickled with very low amps. Time will show how the unit performs, but as of now I am happy and can recommend it.

### ⭐⭐⭐⭐ Mostly good
*by L***H on April 18, 2023*

Overall, this is pretty good. I've tried it out on a good half dozen various flat plate, agm, from little UPS to car batteries. My experiences so far: 3 small dead 5AH UPS batteries either reading 0V or 2V... Pretty much nothing, this wouldn't do anything with them. another 5ah UPS battery and a couple 12ah UPS battery that were all at least somewhat usable. You can only set the CCA for the battery down to 100AH and the UPS batteries weren't rated. So, the 5ah battery showed as being really bad. And it wasn't in great shape anyway. But after the repair, the health numbers did improve. My car had an Optima deep cycle that it drained over a few days. Also, had a good UTV battery that was sitting for months that was dead. Both were at around 6V. For these, the unit would turn on without AC power and give some sort of health readings saying they both needed to be recharged. BUT... The charger couldn't do it. As soon as you told it to charge, it would just blink/beep presumably from overload. Not sure if it would have resolved itself if I left it like that for some length of time... I had another small 6amp smart charger I used in both cases for maybe an hour to start. It also was blinking like it was overloaded, but not as bad and it straightened itself out in a minute. And after that time and the voltage was up over like 10V, then this unit was able to finish the charging without a problem and the health of both was good. Also had a 5 year old cheapy lawnmower battery that neither this nor my 6amp charger would even recognize as anything even connected. But after maybe 10 minutes of playing with the connections with both chargers connected to it, it finally started to show on the chargers as something there. I took off the 6amp charger and this unit now said it was there but very bad health and around 10V It said to replace it. Charging was only putting in less than an amp. I ran the repair on it, and another charge and now it's showing as healthy. So... it's a nice little unit to quickly get some ideas of the shape of batteries, perhaps get a little more life into them and charge them. But, realize that you need to read into the situation, not necessarily just do what it says and that you may need another charger to help get started with good sized batteries that are REALLY low.

## Frequently Bought Together

- KONNWEI 3 in 1 Battery Charger, Car Battery Tester KW510 12V 5-Amp Fully Automatic Smart Charger Automotive Pulse Repair Maintainer, Trickle Charger Battery Desulfator w/Temp Compensation
- NOCO GENIUS1, 1-Amp Fully-Automatic Smart Charger, 6V and 12V Portable Battery Charger, Battery Maintainer, Trickle Charger, and Battery Desulfator with Temperature Compensation

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-07*