This is a great device for those with heavy-duty trucks and cars. The Foxwell Automotive Battery Load Tester can run tests on an array of batteries, including regular flooded, AGM flat plate, AGM spiral and gel batteries. The device can check the overall health of your battery, gauge the cranking capability, and check its aging status. While it is on the pricier side of our list, it comes with a number of exciting features, including a built-in cranking test and a charging system test. The ergonomic design is easy to use and convenient. It also comes with a 7.8-foot cable that enables you to run your battery test from within your car. This is perfect when there are bad weather conditions and adds further comfort to your experience. This is a fabulous machine and showcases brilliant design and quality.