Amazon.com.br:Avaliações de clientes: Konnwei KW208 testador de bateria de carro 12V, testador de carga CCA 100-2000, testador de alternador automotivo, analisador de bateria automotiva, sistema de carregamento de arranque para carro, caminhão, motocicleta, SUV, barco
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Initially I liked this unit. It has good build quality and feels well-made.
On first hookup it told me to replace my battery and that my charging system was fine. My battery is under warranty and I took it to Ford--where they have a very expensive tester and a one-hour plus test procedure for battery warranty. The Ford tester shows it as good. The CCA test at Ford showed my 760 CCA-rated battery could put out over 800 amps. Their other tests were about the same--Ford says my battery is still good, the Konnwei says it isn't. After coming home without a new battery, I tested my battery, waited a few minutes, repeated the test, waited, repeated the test. I got different readings each time. Further, they fluctuated. One reading might be higher or lower than the next. Overall, I don't feel I can trust this meter about battery life.
The provided documentation is sparse. They give a quick run through on how to set up and test and define the abbreviations, but there is nothing to explain what you're testing. I mention this because the copy says it is easy for a beginner to use. It is easy to use, but not easy to understand. For example, there is a selection of DIN. My battery has a DIN number on it, but it doesn't correspond to what the tester offers and I have no information on how to apply the data.
Sad to see it go. For the price and quality I thought it would have a permanent place in my garage.
When I bought this battery tester at such an attractive price, I don't have a high expectation as long as it can provide me with some indication as to the health of the car battery in order to avoid being stranded on the road. Per its instruction, one needs to turn on the headlights for 10 seconds before reading. I tested it on a brand new Interstate CCA 730 battery. After fully charged the battery with a maintainer and turning on headlights for 10 seconds, this tester reads SOC at 60%. I did several subsequent readings and gradually, the SOC finalize somewhere at 80% SOC. If I test it without turning on the headlight after a full charge, it consistently reads at 98% SOC. So, that leaves you scratching your head which reading is correct. Since this one is relatively inexpensive, I'll keep it and likely buy another analog battery tester, such as the Schumacher BT-100, to double-check their accuracy for comparison. With that said, short of buying a professional grade tester, I am not certain there is a consumer battery tester that can provide an accurate reading. If there is one, I welcome your suggestions so that I can ditch this one.
It wasn't able to detect a dead cell in a battery, it just said it needed recharging. Professional tester at battery place said it definitely had a dead cell. It seemed to test other things correctly but I didn't trust it after the false reading on the bad battery.