Keep tabs on your vehicle’s battery and starting system with the KONNWEI KW650 Car Battery Tester. Designed for 6V and 12V batteries, this compact diagnostic tool can test battery condition, cranking performance and charging system operation, making it a useful addition to any garage or workshop.
With support for batteries rated from 100–2000 CCA, the KW650 is suitable for a wide range of cars, motorcycles and other vehicles.
S***o –
Works perfect, quick delivery.
I***r –
Great product. It works perfectly and provides very useful information about the battery status. You can choose many languages (better to leave it in English) and select all different standards (EN, DIN etc.). I still need to test the startup test. I am very satisfied with the purchase. It does things that cannot be done with a multimeter.
K***d –
Very accurate battery tester. I’ve already ordered 4 pieces for friends. Compared measurements with an expensive brand device and achieved the same results. Purchase recommendation!!
G***i –
This is already the second tester bought on in such a short time.
The product, unlike the previous purchase, is neatly packaged and wrapped in foil; you can immediately see a different approach to the customer. Just new.
Quickly try to measure the battery and see the differences in measurement results as well. More adequate for the actual battery condition that was tested by four different testers.
No problem, I can recommend this tester to anyone.
S***r –
Incredibly fast delivery to germany (5 days). Works perfectly and measurement values are very precise compared to a battery tester made by fluke. I am very, very satisfied, 5 stars+
Shopper –
The best model is the kw650. Simple, with plenty of features and, most importantly, a calibration option. I recommend it. The product was delivered quickly.
Shopper –
The KW650 tester arrived within 7 days of the order, and 3
days before the stated delivery date. A big plus that
was packed in an additional box to protect it from
damage during transportation. Plus a fresh production date of 12.01.2026. 12 languages to choose from, including Polish. I am not going to list the advantages of this device. You can read about it on numerous online forums. The only thing that surprised me was that the device does not have an internal battery. An external power source must be used. The kit includes only the cable for connecting the power supply. At a price of 77.17 PLN, I think it’s a great purchase!
5***r –
Great device, I swapped my battery and checked if the old one was still good. At first glance, it looks good, but the internal resistance is no longer as good, so it’s better than a multimeter.
N***r –
A very nice tester, easy to use, reliably measures battery parameters and determines its condition, I highly recommend it as it offers great value for money. The only issue is that the app for updating and viewing data on a computer does not work; the file cannot be downloaded from the manufacturer’s website using the Windows program, but it was possible to download it on a Mac, but the app does not work on Mac OS.
P***g –
A very well-made product, sturdy clamps, long and flexible cables, very easy and intuitive to use, multiple menu languages to choose from, an excellent product at this price, sturdy and well-made cardboard packaging, plus a storage case, perfect for both amateur and professional use. Highly recommended!!!
P***r –
Very nice workmanship, very simple and easy-to-read menu. Bright display. Shows all the data I needed to check the battery condition. I recommend it.