This battery/alternator tester is extremely easy to use. Unlike most simple light indicators, this tester emits 4 lights to indicate battery status (40%, 60%, 80%, 100%) with different colors. Most testers of this type only give 3 (low, medium, high). I highly recommend this tester for its design and simplicity. I ordered 2 testers to keep one in my shed for my mower.
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