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1. Strong Capacity: Works on 12V batteries, battery ratings from 100 - 2200 CCA, including starter and alternator tester;
2. Test Multiple Battery Types: regular flooded, AGM flat plate, AGM spiral and gel; Test standards: CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE;
3. Support both in-vehicle and out-of-vehicle test, no need to remove the battery;
4. Battery Health Test, Cranking Test & Charging Test
5. Test result: SOH, SOC, CCA value, CCA rating, voltage, internal resistance, etc;
6. Provide reliable results within seconds, accurancy up to 99.9%; display suggestion according to the testing results (Good, Recharge, Replace), detects bad cells directly;
7. Polarity reverses connection protection;
8. Support 8 languages: English, Russian, French, Spanish, German, Italian, Portuguese, Dutch, etc.
9. Suitable for automobile factory, garage, auto battery manufacturer, and DIY enthusiasts, etc.
WARNING:
- 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 your battery conditions in advance before it dies!
Plug and play--input the rated battery capacity, KW208 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.
Multi-tests in One Battery Tester
All-in-one 12V car battery tester with cranking and charging system test, load and alternator tester.
FAST & ACCURATE RESULTS
With the best STM-32 main chip, KONNWEI KW20812V automotive battery analyzer testing speed is much faster than others, also provide more accurate and reliable results.
High precision amplifier which calibrated by professional instruments, giving you more precise reports within seconds!
CONVENIENT TESTING SITUATIONS
No matter the batteries in the vehicles or out of the vehicles, KW208 will finish its testing job excellently, pocketed size let you can bring it to anywhere you want.
Support 8 languages
Support 8 languages. English, Russian, French, Spanish, German, Italian, Portuguese, Dutch.
Alternator & Starter Test
Display SOH (State of Health), SOC (State of Charge), Voltage, Current, Rating, and the readable analysis results on the 2.4-inch LCD screen.
Charging Test & Cranking Test
Test different parts of the charging system, including generator, rectifier, rectifier diode, and so on for a reliable charging volt value.
Cranking test helps you analyze the starting motor including cranking voltage and the cranking time to check the starting motor works properly or not
Eljohn
2025-09-07 11:47:20
Positives:-Works as intended, providing accurate battery readings.-Easy-to-navigate menu for hassle-free operation.-Compact design allows for easy storage in the car's compartment.-Essential for regular battery checks, especially for those experiencing battery issues.Negatives:-Virtually no drawbacks; it effectively delivers on its promises.The KONNWEI KW208 12V Car Battery Tester has proven to be an indispensable tool in my car maintenance routine. As someone currently facing battery problems, I rely on this device to regularly check my battery's status, and it has been a lifesaver.The tester works exactly as intended, offering clear and accurate readings that help me determine when I need to charge my battery. The menu is straightforward, making navigation quick and simple, even for those who may not be tech-savvy.Its compact size is another standout feature; it fits snugly in my car's storage compartment, ensuring that it's always on hand when I need it. While there are no notable negatives to mention, it’s worth emphasizing that it fulfills its purpose effectively. Overall, the KONNWEI KW208 is a reliable and practical investment for anyone looking to keep their car battery in check.
LR
2025-09-02 14:08:58
This thing is awesome for the money. It’s far more intuitive than the old school carbon pile load testers, plus it will give you more info than the old school load tester. It’s been accurate enough as far as I can tell when I stick a multimeter and old school load tester on the same battery.This tester is so cheap that it will pay for itself the first time you use it. It will tell you the battery’s health and charge level and do an alternator test and getting any of these correct will save you a tow and a fat mechanic bill. I throw it on my cars when the batteries are getting a couple years old to see if I need to swap a battery before it’s totally dead so my mother or wife doesn’t get stranded.
Kelly G
2025-08-27 15:59:57
This is a fast and easy way to read and reset codes on your car. It does a good job and you can get a good price on it.
Murphy
2025-07-22 11:22:54
Amazing for the price. You won’t be disappointed! Works straight out of the box, with no batteries or charging needed since it’s powered directly from the car.The instructions aren’t the best, so for those who might not know: connect it to the car by attaching the Positive (red) clamp to the positive terminal of the car battery first, then connect the Negative (black) clamp to the negative terminal on the battery. It can test batteries both in and out of the car.The device will power on once connected, and you get three options for testing the battery with step-by-step instructions.The three options are Battery Test, Cranking Test, and Charging Test. The Battery Test will determine the health of a battery, the Cranking Test will measure the battery's ability to start the engine, and the Charging Test will measure the voltage of the battery while the vehicle is running to determine if the battery and alternator are working.If you think you have a bad alternator, use this device first and run through the tests. It provides straightforward results (as shown in the photo) that tell you if the battery is good, needs to be replaced, or if the alternator has no output.Couldn’t recommend this device enough
Jon Treffert
2025-07-14 18:13:15
I was experiencing a 12V battery on my EV losing charge and wanted to determine if it was the battery or internal charging unit. The unit was simple to operate and indicated a bad cell which was verified at my dealer service.
Alex Rivera
2025-07-06 15:36:11
This battery tester is great. It worked exactly as expected, and I was really surprised by all the extra features it has. I thought it would just be a simple tester, but it does way more than I anticipated. Definitely worth the price!
tj Capuano
2025-05-17 10:05:01
Easy to use and worth the money
RaminG
2025-04-23 13:13:49
Better than a DVM.Much cheaper than a shop-grade Automotive Battery Tester.Easy to use. Detects most Battery Problems.Pros:1. Easy to Use, Compact and Inexpensive.2. Tests wide variety of 12V Auto Batteries.3. Checks Engine Starting and Battery Charging health.Cons:1. Skimpy Manual with small TypeFont.2. Valid Analysis depends on correct CCA and Battery type inputs.3. Can’t confirm battery performance at low temperature.Precautions:Test the battery directly at it's terminals. Some cars like Hybrids, have Remote Jump Start terminals. Using the more convenient Engine bay terminals may give false 'BAD Battery' results.Detailed Analysis:1. Tested one 3S 12.5V Lithium Battery, four AGM Flat-Plate Batteries, four FloodedCell LeadAcid batteries, six autos (Two Hybrids), and two inboard V8 Boats.2. Detection of common issues:a. GOOD: Charging System healthy voltages and quality (AC Ripple).b. GOOD: Low battery voltages, bad cells, loss of capacity.c. GOOD: Cranking current under test conditions and comparison to Rated Cold Cranking Current.d. MARGINAL: No direct indication of battery capacity (Amp-Hour Capacity). 5 year old Flooded Pb Starter battery with only 1 Amp-Hour usable capacity tested as good when charged.e. MARGINAL: Probably not able to predict all Cold Starting issues.December 2023 Update: AVOID testing batteries in Hybrid vehicles from the remote 'Jump Start' Ports! Picking the Test Standard (CCA, MCA, etc.):1. I tested a 4year old Chrysler Pacifica Hybrid Battery and it reported a low Cranking Amp Reading with a recommendation to "REPLACE" when tested at the 'Jump Start' Posts in the engine compartment (The 12V battery is in the Left Rear Side compartment inside the minivan). When the battery was removed and tested directly at the battery., they results was "GOOD" battery with a nominal ColdCrankingAmp reading.2. There are a large number of 'Test Standards' including CCA, MCA, etc. to choose. For example, most Starter batteries in the US are rated for CCA (Cold Cranking Amps at 0F). Use this to provide an accurate assessment against the Battery's Rating. Use the MCA (Marine Cranking Amps) for boat applications where the operating temperature is 32F. The MCA readings will be generally higher (better) than the CCA.
Paul
2025-04-18 10:16:33
I love the ease of use of this device. The Battery, Charging, and Cranking test are great features to test your car's starting system.
David
2025-04-16 10:27:00
Lo he probado en varias baterÃas y funciona perfectamente, sencillo de utilizar y muy fiable. Una manera rápida de checkear una baterÃa 12v de manera fiable. Complementario a otro probadores como puede ser el densimetro y comprobador de alta corriente para testesr la descarga.
Bernd Peters
2025-02-05 14:09:00
Funktioniert Einwandfrei ! Hab ihn mit einem Profigerät von Banner verglichen!
CAS
2024-12-27 19:05:28
The KW208 Car battery tester is a perfect instrument to test your car battery, especially if your car battery is older than 5 years and the winter is coming. The instrument was tested on 2014 Toyota Camry LE and the readings were consistent and similar to a professional garage instrument. This is a very good instrument to have.
John Carbonsi
2024-12-23 13:07:31
Worked great! Perfect for a quick test before you fire the ‘parts cannon’
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