I had a car battery drain problem and wasn't sure if it was the battery or the alternator. I have a simple one with an LED to check the battery and also a load tester for the battery. I needed something that can do this with more detail. Different options for battery wattage, types, ripple current and starting was the deciding factor for me to get this. The reverse protection also helped a couple of times when I wired it wrong. Everything worked fine, now let's look at the reliability over time.
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