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OTC MinuteMan Plus Multi-Application Electrical System Tester with Cart MinuteMan Plus saves you hours when you’re testing batteries, starters, alternators, regulators, and charging systems. The way it has been your customer brings in a dead battery and you have to charge it up to test it. Then, if it’s a keeper, you have to recharge it. Its hardly an efficient use of your valuable time. With MinuteMan Plus on the job, you can test discharged batteries down to as low as two volts, and it won’t drain a charged battery you are testing. You won’t waste time charging bad batteries. Works on all 12-volt automotive-type batteries with cold cranking ampere ratings of 100-1500. This includes batteries found in motor-vehicle, marine, agricultural, forestry, and industrial applications.