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12 Volt Battery/Alternator Tester - 66842 view this item at harborfreight.com »

Ratings: (5 is best)

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Review by photoleif on March 21st, 2012
This battery/alt tester is, I suppose, better than nothing. But I don't like that it always shows all of the lights that "lead up to" the level the battery is at. For instance, if the battery is charged to 12.6v, the red, amber and green LEDs all light. I was hoping for a discrete LED light. Also there's no explanation of what the alternator side really does. It plugs into the lighter socket so it's not getting any sort of direct read off the alt. Puzzling.

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