This device boasts a small and compact design and is able to indicate test results to you directly via its digital screen. This car battery tester can gauge the battery power of 12V batteries and is able to give an overall analysis of the battery’s health by checking its voltage charge, cranking power, and usage time. This device also happens to give a super accurate CCA reading (and can gauge between 100-2000) CCA. The device is powered by the 12volt battery and thus doesn’t operate on any extra batteries, and it comes with three-foot long cables. Ancel offer customers a two-year warranty and thus believes in the effectiveness and durability of its car battery tester.