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ALTERNATOR/BATTERY TESTER - 46972 view this item at harborfreight.com »

Ratings: (5 is best)

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Review by Bigplanz on November 2nd, 2009
I got this for $3. Tester my battery and alternator with it and the measurements matched my other testers. I keep this in the tool box in my car it I have 'on the road' problems. It has a magnet strip on the back to hold it to the car frame while you connect the probes. Only downside is that to fully test the alternator you have to rev the engine to around 2000 RPM, so you'll need a second person to rev the engine while you connect the probes.

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