--- product_id: 278506336 title: "KW510 Battery Charger" brand: "konnwei" price: "£70.42" currency: GBP in_stock: true reviews_count: 13 category: "Konnwei" url: https://www.desertcart.co.uk/products/278506336-kw510-battery-charger store_origin: GB region: United Kingdom --- # 5A max output with pulse repair tech 3-in-1 charger, tester & maintainer 8 safety protections + temp compensation KW510 Battery Charger **Brand:** konnwei **Price:** £70.42 **Availability:** ✅ In Stock ## Summary > 🔋 Power up smarter, not harder — never get stranded again! ## Quick Answers - **What is this?** KW510 Battery Charger by konnwei - **How much does it cost?** £70.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/278506336-kw510-battery-charger) ## 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 - • **Smart Pulse Repair:** Revive sulfated batteries and extend lifespan with cutting-edge pulse desulfation technology. - • **Safety-First Design:** Advanced protections including reverse polarity, overload, and temperature compensation keep you worry-free. - • **All-in-One Powerhouse:** Test, charge, and repair your 12V batteries effortlessly with one sleek device. - • **Universal Compatibility:** Works flawlessly with all 12V lead-acid batteries—flooded, AGM, gel, and more. - • **Instant Battery Health Insights:** Get precise voltage, internal resistance, and CCA readings on a vibrant color LCD in seconds. ## Overview The KONNWEI KW510 is a professional-grade 3-in-1 automotive battery tester, charger, and maintainer designed for 12V lead-acid batteries. Featuring a large color LCD, it delivers fast, accurate diagnostics including voltage, internal resistance, and cold cranking amps. Its fully automatic 5-amp charging with pulse repair technology restores battery health by combating sulfation. Compatible with a wide range of battery types and vehicles, it prioritizes safety with 8 built-in protections and smart temperature compensation, making it an essential tool for proactive battery care. ## Description Buy 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: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases 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 | #148,618 in Automotive ( See Top 100 in Automotive ) #575 in Battery Chargers | | Brand | KONNWEI | | Brand Name | KONNWEI | | Color | Yellow | | Compatible Devices | Cars, boats, lawnmowers, etc. | | Customer Reviews | 4.3 out of 5 stars 752 Reviews | | Item Dimensions | 6.3 x 3.7 x 2.4 inches | | Item Weight | 1.4 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 | | Number of Items | 1 | | Part Number | KW510 | | Power Source | Battery Powered | | UPC | 657419949613 657419949682 | | Unit Count | 1 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 ![KW510 Battery Charger - 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 --- ## 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.co.uk/products/278506336-kw510-battery-charger](https://www.desertcart.co.uk/products/278506336-kw510-battery-charger) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-09-10*