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KONNWEI Battery Relay Tester KW371
The KONNWEI Car Battery Relay Tester KW371, 2 in 1 6V 12V 24V Battery Tester with 4 Pin 5 Pin Relay Testing Fault Data Print Start Test and Charging Scan Tool 2026 combines two useful diagnostic functions. This KW371 2 in 1 testing tool checks batteries and automotive relays with one compact device. Moreover, its 6V 12V and 24V battery support suits cars, motorcycles, boats, trucks, yachts, SUVs, and ATVs. The 4 pin and 5 pin relay testing mode adds flexibility. In addition, the start and charging system test helps identify electrical faults. Fault data printing also creates clear service records.
KW371 2 In 1 Tool
The KONNWEI Battery Relay Tester works as a battery analyzer and relay tester. Therefore, technicians can test more components without carrying separate tools. This KW371 2 in 1 testing tool supports regular flooded, AGM flat plate, AGM spiral, EFB, GEL, and lithium batteries. Furthermore, the 6V 12V and 24V battery support covers a wide range from 10 to 2000 CCA. The 4 pin and 5 pin relay testing function switches between common relay layouts. Meanwhile, the start and charging system test checks key vehicle performance. Fault data printing makes each result easier to save, review, and share.
6V 12V 24V Support
Reliable 6V 12V and 24V battery support makes this tester useful in repair shops and roadside service. Likewise, car dealers and DIY users can check battery health before replacement. The KONNWEI Battery Relay Tester measures voltage, starting performance, and charging output. Also, its KW371 2 in 1 testing tool design reduces diagnostic time. The 4 pin and 5 pin relay testing feature checks relay operation with adjustable settings. Next, the start and charging system test helps locate weak batteries, poor alternator output, or starting issues. Fault data printing provides a practical report for customers and workshop files.
4 Pin 5 Pin Testing
The 4 pin and 5 pin relay testing mode supports many common automotive relay types. As a result, users can check relays before replacing working parts. The KONNWEI Battery Relay Tester operates as a relay tester for 12V and 24V systems. In addition, the KW371 2 in 1 testing tool combines relay checks with detailed battery analysis. Its 6V 12V and 24V battery support expands daily workshop use. Then, the start and charging system test examines electrical performance under real conditions. Fault data printing records detected problems. Consequently, this tool helps reduce guesswork, unnecessary purchases, and repeated diagnostic work.
KONNWEI Battery Relay Tester KW371
The KONNWEI Car Battery Relay Tester KW371, 2 in 1 6V 12V 24V Battery Tester with 4 Pin 5 Pin Relay Testing Fault Data Print Start Test and Charging Scan Tool 2026 offers practical diagnostics in a portable format. First, the KW371 2 in 1 testing tool gives professionals quick access to battery and relay functions. Its 6V 12V and 24V battery support fits light and heavy vehicles. Similarly, the 4 pin and 5 pin relay testing function supports common service tasks. The start and charging system test checks critical electrical systems. Finally, fault data printing produces readable results for service documentation.
Start And Charging System Test
A complete start and charging system test helps users assess battery cranking power and charging performance. Therefore, the KONNWEI Battery Relay Tester can reveal issues before a vehicle fails to start. The KW371 2 in 1 testing tool also supports repair shops, roadside teams, dealerships, and home garages. Moreover, its 6V 12V and 24V battery support covers different vehicle classes. The 4 pin and 5 pin relay testing mode adds another useful diagnostic layer. After testing, fault data printing creates a physical record. The multilingual interface supports English and many European and Asian languages, which improves access across the UK, USA, Canada, and Australia.
Fault Data Printing Tool
Fault data printing helps workshops provide clear results and professional customer reports. Additionally, the KONNWEI Battery Relay Tester carries CE and RoHS certification. The KW371 2 in 1 testing tool includes one-year free return and exchange support. Its 6V 12V and 24V battery support, 4 pin and 5 pin relay testing, and start and charging system test create a complete electrical diagnostic package. Buyers searching for the KW371 price, sale offers, promotions, where to buy, or how to order online can compare current availability in the USA, UK, Canada, Australia, and other markets. Overall, fault data printing and broad vehicle compatibility make KW371 a practical choice.
l***r –
“niceeeeeee,,, i like this thing, i like the fact that you can test the batteries but the relays, holly cow, where has this beeeen??? Seriously this is just awesome, the tester seems pretty durable. The clamps and cables are thick, everything about it seems high quality, just perfect, and for the money i think is great
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a***r –
“this product is a new product of konnwei brand, integrating battery testing and relay testing into one product, which is very convenient and eliminates the need to purchase expensive relay testing equipment separately. Recommended!
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p***r –
“a very handsome battery tester!
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h***r –
“in my ever growing collection of tools this one is a beastly battery tester, live data for charging and wave tracking?? You can test just about any relay too! Clear screen and intuitive design this is better than my harbor freight tester! I have to travel 45 min to and from work every day, making sure i’m prepared for the inevitable this is a new must carry in your glovebox/travel tool bag. I’ve been stranded on the side of the road and needed to swap out batteries and alternators with just some basic tools, difficult but can be done, this little guy will help me diagnose and avoid just throwing parts at my cars! I highly recommend this newly growing brand. I haven’t been let down yet! As you can tell from the pictures my battery is 5 years old and still holding on!
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k***r –
“excellent battery tester with built-in relay tester on the back. This is awesome that i’m able to test relays by simply plugging them in. I remove all motorcycle and atv batteries and leave them on a dedicated battery shelf during off season. This all makes testing batteries so much easier (even if left in vehicle). It has all the options to select the specific battery model and will test automatically. If i start quality and definitely worth the price point if you have multiple vehicles or toys.
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b***r –
“no need to purchase a relay tester separately, it’s very useful and highly recommended!
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a***r –
“i got this tester to replace a slightly older unit that doesn’t cover as many battery types as this one does, and i didn’t really pay attention to the relay test portion until i received it and noticed that feature. I have been chasing an issue on my toyota tundra for a while that i thought involved a relay but it was difficult to tell without a lot of time consuming testing on each individual relay. This tester made that process a breeze! Pull a relay and plug it into the proper spot and you get a result right now, and then you can move on to the next one. So easy and fast; i love it for this feature alone.
s***r –
“i really like the product that combines battery tester and relay tool, it’s very convenient!
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k***r –
Does exactly what it’s supposed to do.
K***n –
Thank you so much
m***r –
“the merchant’s service is very good. This is the official store of konnwei, which is more secure than other stores selling konnwei!
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w***r –
Great! I think it’s very good. I particularly like that it can test batteries. But relays, my goodness, where did they go before?! To be honest, it’s simply amazing. The tester looks very durable. The clips and cables are both very thick, and all components appear to be of high quality, almost perfect, and i think this price is very cost-effective.
l***r –
“i like the fact the unit was easy to use. The device comes in a nice case and the instructions manual. The price and shipping were good!
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r***r –
“customer service is very patient and i really like their service!
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j***r –
“it has battery detection and battery charger functions, i really like it
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m***r –
It combines battery detection and relay functions, very convenient, recommended!
d***r –
“the function and product description are exactly the same, very user-friendly! I have purchased excellent car tools!
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w***r –
This is an artwork!
S***o –
Good.
b***r –
I really like this thing. It can check my relays and perform battery testing like kw341. I really like it and recommend it!