Product Details: Ensure your semi truck is Ready for the Road Ahead™ with a strong and healthy battery, with the Schumacher 6/12V 100A Battery Load Tester and Voltmeter. To evaluate the performance of a battery, this replacement devices uses a real-world simulation to see how well a battery performs when charged. Built with an additional voltmeter to test voltage capabilities. FleetPride is your First Click in Heavy Duty®.