... change of the voltage when start the vehicle7.Can test battery standard:100-1700CCA,100-1000DIN,100-1000IEC,100-1700EN, ... JIS.Features:1.Quickly test the battery’s main specifications: Internal Resistance, CCA, Voltage, Electric quantity, ... 5.Printer inside, can print out testing results anytime.Specifications:Power supply: Powered by the battery being tested.Voltage range: 9-18V ...